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new file mode 100644
index 0000000000000000000000000000000000000000..5a13f818804384fe518217545013fffae281c516
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diff --git a/LinkedList/.vs/LinkedList/DesignTimeBuild/.dtbcache.v2 b/LinkedList/.vs/LinkedList/DesignTimeBuild/.dtbcache.v2
new file mode 100644
index 0000000000000000000000000000000000000000..f6985940fe71e710a10caa33d3a12431c6f77b2a
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diff --git a/LinkedList/.vs/LinkedList/v15/.suo b/LinkedList/.vs/LinkedList/v15/.suo
new file mode 100644
index 0000000000000000000000000000000000000000..c7074987f5b16ab05472af6a40a42b24e947f969
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diff --git a/LinkedList/.vs/LinkedList/v15/Server/sqlite3/db.lock b/LinkedList/.vs/LinkedList/v15/Server/sqlite3/db.lock
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/LinkedList/.vs/LinkedList/v15/Server/sqlite3/storage.ide b/LinkedList/.vs/LinkedList/v15/Server/sqlite3/storage.ide
new file mode 100644
index 0000000000000000000000000000000000000000..56758a88b356f5fc284d2b23256cb2a77affde45
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new file mode 100644
index 0000000000000000000000000000000000000000..0a8ba9cee125cd06c631bbd383bd0f28df8ad969
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diff --git a/LinkedList/.vs/LinkedList/v15/Server/sqlite3/storage.ide-wal b/LinkedList/.vs/LinkedList/v15/Server/sqlite3/storage.ide-wal
new file mode 100644
index 0000000000000000000000000000000000000000..77bd184840b0fcb4a368c6107eea4d42182d406f
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diff --git a/LinkedList/.vs/LinkedList/v16/.suo b/LinkedList/.vs/LinkedList/v16/.suo
new file mode 100644
index 0000000000000000000000000000000000000000..535e84887d383a25d7f812615ae774388a41d880
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diff --git a/LinkedList/LinkedList.sln b/LinkedList/LinkedList.sln
new file mode 100644
index 0000000000000000000000000000000000000000..c04ea726b0a820f14e90858b045618d7226475be
--- /dev/null
+++ b/LinkedList/LinkedList.sln
@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30611.23
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LinkedList", "LinkedList\LinkedList.csproj", "{2FA458D9-4162-4E31-90EE-97605B736F98}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{2FA458D9-4162-4E31-90EE-97605B736F98}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2FA458D9-4162-4E31-90EE-97605B736F98}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2FA458D9-4162-4E31-90EE-97605B736F98}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{2FA458D9-4162-4E31-90EE-97605B736F98}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {519B01D6-E990-4673-B0A0-D2C6FEB0C6EE}
+	EndGlobalSection
+EndGlobal
diff --git a/LinkedList/LinkedList/DoubleLinkList.cs b/LinkedList/LinkedList/DoubleLinkList.cs
new file mode 100644
index 0000000000000000000000000000000000000000..835b358a00318db7a6af40fa47681fe0cb3f1f7e
--- /dev/null
+++ b/LinkedList/LinkedList/DoubleLinkList.cs
@@ -0,0 +1,200 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace LinkedList
+{
+   public class DoubleLinkList<T>:IFactory<T>
+    {
+        public DoubleLinkNode<T> Head { get; set; }
+        //public DoubleLinkNode<T> RearNode { get; set; }
+        public DoubleLinkList()
+        {
+            this.Head = new DoubleLinkNode<T>();
+        }
+        public int Length { get; set; }
+        #region Insert
+        /// <summary>
+        /// 头节点插入
+        /// </summary>
+        /// <param name="value"></param>
+        public void AddFront(T value)
+        {
+            DoubleLinkNode<T> targetNode = new DoubleLinkNode<T>(value);
+            if (targetNode != null &&this.Head.Next!=null)
+            {
+                targetNode.previous = this.Head;
+                targetNode.Next = this.Head.Next;
+                this.Head.Next.previous = targetNode;
+                this.Head.Next = targetNode;
+            }
+            else
+            {
+                this.Head.Next = targetNode;
+                targetNode.previous = this.Head;
+            }
+            this.Length++;
+        }
+        /// <summary>
+        /// 尾节点插入值
+        /// </summary>
+        /// <param name="value"></param>
+        public void AddToRear(T value)
+        {
+            DoubleLinkNode<T> targetNode = new DoubleLinkNode<T>(value);
+            var p = this.Head.Next;
+            while (p.Next != null)
+            {
+                p = p.Next;
+            }
+            p.Next = targetNode;
+            targetNode.previous = p;
+
+            Length++;
+        }
+        #endregion
+
+        #region Print
+        /// <summary>
+        /// 输出节点
+        /// </summary>
+        public void PrintItems()
+        {
+            DoubleLinkNode<T> p = this.Head.Next;
+            while (p != null && p != this.Head)
+            {
+                Console.Write(p.Data + "==>");
+                p = p.Next;
+            }
+            Console.WriteLine();
+        }
+        #endregion
+
+        #region Delete
+        /// <summary>
+        /// 删除节点
+        /// </summary>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public bool DeleteItems(T value)
+        {
+
+            DoubleLinkNode<T> p = this.Head;
+            while (p.Next != null && !p.Next.Data.Equals(value))
+            {
+                p = p.Next;
+            }
+            if (p.Next.Data.Equals(value))
+            {
+                p.Next = p.Next.Next;
+                if (p.Next != null)
+                {
+                    p.Next.Next.previous = p;
+                }
+                Length--;
+                return true;
+            }
+            else
+            {
+                Console.WriteLine("未找到该节点，请重新确认是否有该节点");
+                return false;
+            }
+        }
+        #endregion
+
+        #region FindItem
+        /// <summary>
+        /// 查找元素
+        /// </summary>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public bool FindItem(T value)
+        {
+            DoubleLinkNode<T> p = this.Head;
+            while (p.Next != null && !p.Next.Data.Equals(value))
+            {
+                p = p.Next;
+            }
+            if (p.Next.Data.Equals(value))
+            {
+                return true;
+            }
+            return false;
+        }
+        /// <summary>
+        /// 按位置查找 正序查询
+        /// </summary>
+        /// <param name="k"></param>
+        /// <returns></returns>
+        public DoubleLinkNode<T> FindKth(int k)
+        {
+            var p = this.Head.Next;
+
+            int countFirst = 1;
+            if (this.Length >= k && k > 0)
+            {
+                while (p.Next != null && k > countFirst)
+                {
+                    p = p.Next;
+                    countFirst++;
+                }
+                return p;
+            }
+            return null;
+
+        }
+        #endregion
+
+        #region Size
+        /// <summary>
+        /// 返回链表长度
+        /// </summary>
+        /// <returns></returns>
+        public int Size()
+        {
+            if (this.Head != null)
+            {
+                DoubleLinkNode<T> p = this.Head;
+                int len = 0;
+                while (p.Next != null)
+                {
+                    p = p.Next;
+                    len++;
+                }
+                return len;
+            }
+            return 0;
+        }
+        #endregion
+
+        #region 删除双向链表的倒数第n个节点
+        /// <summary>
+        /// 删除双向链表倒数第 n 个结点
+        /// 倒数第n给反过来讲就是正数的（总长度-倒数个数）
+        /// </summary>
+        /// <param name="k"></param>
+        /// <returns></returns>
+        public bool DeleteKth(int k)
+        {
+            var p = this.Head.Next;
+            int countFirst = 1;
+            if (this.Length >= k&&k>0)
+            {
+                while (p.Next != null && this.Length - k >countFirst)
+                {
+                    p = p.Next;
+                    countFirst++;
+                }
+                p.previous.Next = p.Next;
+                p.Next.previous = p.previous;
+                return true;
+            }
+            return false;
+
+        }
+
+
+        #endregion
+      
+    }
+}
diff --git a/LinkedList/LinkedList/DoubleLinkNode.cs b/LinkedList/LinkedList/DoubleLinkNode.cs
new file mode 100644
index 0000000000000000000000000000000000000000..318c6d6e8edf4f120dbd834c58006014ab74dda3
--- /dev/null
+++ b/LinkedList/LinkedList/DoubleLinkNode.cs
@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace LinkedList
+{
+    public class DoubleLinkNode<T>
+    {
+        public T Data { get; set; }
+        public DoubleLinkNode<T> previous { get; set; }
+        public DoubleLinkNode<T> Next { get; set; }
+        public int Key { get; set; }
+        public DoubleLinkNode()
+        {
+            this.Next = null;
+            this.previous = null;
+        }
+        public DoubleLinkNode(int key, T data)
+        {
+            this.Key = key;
+            this.Data = data;
+            this.previous = null;
+            this.Next = null;
+        }
+        public DoubleLinkNode(T data)
+        {
+            this.Data = data;
+            this.previous = null;
+            this.Next = null;
+            //this.previous = this;
+            //this.Next = this;
+        }
+        public DoubleLinkNode(T data, DoubleLinkNode<T> previous, DoubleLinkNode<T> next)
+        {
+            this.Data = data;
+            this.previous = previous;
+            this.Next = next;
+            previous.Next = this;
+            next.previous = this;
+        }
+       
+    }
+}
diff --git a/LinkedList/LinkedList/IFactory.cs b/LinkedList/LinkedList/IFactory.cs
new file mode 100644
index 0000000000000000000000000000000000000000..b57b41196a47fb7f27ad4f7063ccf6ca71eb6330
--- /dev/null
+++ b/LinkedList/LinkedList/IFactory.cs
@@ -0,0 +1,74 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace LinkedList
+{
+    /// <summary>
+    /// 工厂方法类
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    interface IFactory<T>
+    {
+        /// <summary>
+        /// 长度
+        /// </summary>
+        int Length { get; set; }
+
+        #region Insert
+        /// <summary>
+        /// 头节点插入
+        /// </summary>
+        /// <param name="value"></param>
+         void AddFront(T value);
+
+        /// <summary>
+        /// 尾节点插入值
+        /// </summary>
+        /// <param name="value"></param>
+         void AddToRear(T value);
+
+        #endregion
+
+        #region Print
+        /// <summary>
+        /// 输出节点
+        /// </summary>
+         void PrintItems();
+
+        #endregion
+
+        #region Delete
+        /// <summary>
+        /// 删除节点
+        /// </summary>
+        /// <param name="value"></param>
+        /// <returns></returns>
+         bool DeleteItems(T value);
+
+        #endregion
+
+        #region FindItem
+        /// <summary>
+        /// 查找元素
+        /// </summary>
+        /// <param name="value"></param>
+        /// <returns></returns>
+         bool FindItem(T value);
+
+        #endregion
+
+        #region Length
+        /// <summary>
+        /// 返回链表长度
+        /// </summary>
+        /// <returns></returns>
+         int Size();
+
+        #endregion
+
+     
+
+    }
+
+}
diff --git a/LinkedList/LinkedList/LRUCache.cs b/LinkedList/LinkedList/LRUCache.cs
new file mode 100644
index 0000000000000000000000000000000000000000..4fe00c6609014c4d5b597404ca23ac12b40b8622
--- /dev/null
+++ b/LinkedList/LinkedList/LRUCache.cs
@@ -0,0 +1,115 @@
+using Microsoft.VisualBasic.CompilerServices;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace LinkedList
+{
+    /// <summary>
+    /// 新数据直接插入到列表头部
+    ///缓存数据被命中，将数据移动到列表头部
+    ///缓存已满的时候，移除列表尾部数据
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+
+   public class LRUCache<T>
+    {
+        private int Length { get; set; }
+        private int Capacity { get; set; }
+        private Dictionary<int, DoubleLinkNode<T>> Dic;
+        private DoubleLinkNode<T> LinkHead { get; set; }
+        public LRUCache(int capacity)
+        {
+            this.LinkHead = new DoubleLinkNode<T>(-1, default(T));
+            this.LinkHead.Next = LinkHead.previous = LinkHead;
+            this.Length = 0;
+            this.Capacity = capacity;
+            this.Dic = new Dictionary<int, DoubleLinkNode<T>>();
+        }
+        /// <summary>
+        /// 构造一个Get访问器
+        /// </summary>
+        /// <param name="key"></param>
+        /// <returns></returns>
+        public T Get(int key)
+        {
+            if (Dic.ContainsKey(key))
+            {
+                DoubleLinkNode<T> n = Dic[key];
+                MoveToHead(n);
+                return n.Data;
+            }
+            else
+            {
+                return default(T);
+            }
+        }
+        /// <summary>
+        /// 构造一个Set写入器
+        /// </summary>
+        /// <param name="key"></param>
+        /// <param name="value"></param>
+        public void Set(int key, T value)
+        {
+            DoubleLinkNode<T> n;
+            if (Dic.ContainsKey(key))
+            {
+                n = Dic[key];
+                n.Data = value;
+            }
+            else
+            {
+                n = new DoubleLinkNode<T>(key, value);
+                AttachToHead(n);
+                Length++;
+            }
+            if (Length > Capacity)
+            {
+                //如果更新节点后超出容量。删除最后一个
+                RemoveLast();
+                Length--;
+            }
+            Dic.Add(key, n);
+        }
+        /// <summary>
+        /// 移除链表最后一个节点
+        /// </summary>
+        private void RemoveLast()
+        {
+            DoubleLinkNode<T> temp = LinkHead.previous;
+            RemoveFromList(temp);
+            Dic.Remove(temp.Key);
+        }
+        /// <summary>
+        /// 移除双链表节点
+        /// </summary>
+        /// <param name="temp"></param>
+        private void RemoveFromList(DoubleLinkNode<T> temp)
+        {
+            temp.previous = LinkHead;
+            temp.Next = LinkHead.Next;
+            LinkHead.Next.previous = temp;
+            LinkHead.Next = temp;
+        }
+        /// <summary>
+        /// 将一个孤立的节点放到头部
+        /// </summary>
+        /// <param name="n"></param>
+        private void AttachToHead(DoubleLinkNode<T> n)
+        {
+            n.previous = LinkHead;
+            n.Next = LinkHead.Next;
+            LinkHead.Next.previous = n;
+            LinkHead.Next = n;
+        }
+        /// <summary>
+        /// 从链表中的节点放到头部
+        /// </summary>
+        /// <param name="n"></param>
+        private void MoveToHead(DoubleLinkNode<T> n)
+        {
+            RemoveFromList(n);
+            AttachToHead(n);
+        }
+    }
+}
diff --git a/LinkedList/LinkedList/LinkedList.csproj b/LinkedList/LinkedList/LinkedList.csproj
new file mode 100644
index 0000000000000000000000000000000000000000..c73e0d1692ab38cc8596bbd32ae080d903aaa778
--- /dev/null
+++ b/LinkedList/LinkedList/LinkedList.csproj
@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+</Project>
diff --git a/LinkedList/LinkedList/Program.cs b/LinkedList/LinkedList/Program.cs
new file mode 100644
index 0000000000000000000000000000000000000000..78d4290074004cc79cb9fba77337ea1c8be3f7d0
--- /dev/null
+++ b/LinkedList/LinkedList/Program.cs
@@ -0,0 +1,142 @@
+using System;
+
+namespace LinkedList
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            #region 单链表
+            //头节点构造
+            SingleLinkList<string> singleLink = new SingleLinkList<string>();
+
+            #region 单链表头部插入
+            singleLink.AddFront("1");
+            singleLink.AddFront("2");
+            singleLink.AddFront("3");
+            #endregion
+
+            #region 尾部插入
+            singleLink.AddToRear("0");
+            singleLink.AddToRear("-1");
+            singleLink.AddToRear("-2");
+            #endregion
+
+            #region 删除
+            singleLink.DeleteItems("2");
+            singleLink.DeleteItems("1");
+            #endregion
+
+            #region 查找
+            // 按元素查找
+            singleLink.FindItem("3");
+            singleLink.FindItem("0");
+            
+
+            //按位置查找
+            singleLink.FindKth(1);
+            singleLink.FindKth(2);
+
+            #endregion
+
+            #region 输出
+            singleLink.PrintItems();
+            #endregion
+
+            #region 反转
+            singleLink.RevertSingleLinkList();
+            #endregion
+
+            #region 长度
+            singleLink.Size();
+            #endregion
+            #endregion
+
+            #region 双向链表
+            //头节点构造
+            DoubleLinkList<string> doubleLink = new DoubleLinkList<string>();
+            #region 添加到头部
+            doubleLink.AddFront("1");
+            doubleLink.AddFront("2");
+            doubleLink.AddFront("3");
+            #endregion
+
+            #region 添加到尾部
+            doubleLink.AddToRear("0");
+            doubleLink.AddToRear("-1");
+            doubleLink.AddToRear("-2");
+            #endregion
+
+            #region 删除
+            //按元素删除
+            doubleLink.DeleteItems("0");
+            //按位置删除 倒序删除
+            doubleLink.DeleteKth(1);
+            #endregion
+
+            #region 查找
+            //按元素查找
+            doubleLink.FindItem("1");
+            //按位置查找 正序
+            doubleLink.FindKth(2);
+            #endregion
+
+            #region 输出
+            doubleLink.PrintItems();
+            #endregion
+
+            #region 长度
+            doubleLink.Size();
+            #endregion
+            
+            #region 删除倒数元素和查找第几个元素
+            doubleLink.AddFront("4");
+            doubleLink.AddFront("5");
+            doubleLink.AddFront("6");
+            doubleLink.AddFront("7");
+            doubleLink.DeleteKth(3);
+            doubleLink.FindKth(2);
+            Console.ReadLine();
+            #endregion
+
+            #endregion
+
+            #region LRU
+            LRUCache<int> cache = new LRUCache<int>(3);
+            cache.Get(1);
+            cache.Set(1, 1);
+            cache.Set(2, 2);
+            cache.Get(3);
+            cache.Set(3, 3);
+            cache.Set(4, 4);
+            cache.Get(2);
+            #endregion
+
+            #region Combine
+            SingleLinkNodes<int> first = new SingleLinkNodes<int>(1);
+            first.InsertAfter(3);
+            first.InsertAfter(5);
+            first.InsertAfter(6);
+            first.InsertAfter(7);
+
+            SingleLinkNodes<int> second = new SingleLinkNodes<int>(2);
+            second.InsertAfter(4);
+            second.InsertAfter(5);
+            second.InsertAfter(8);
+            second.InsertAfter(9);
+
+            SingleLinkNodes<int> result = first.Combine(second);
+
+            SingleLinkNodes<int> p = result;
+
+            while (p != null)
+            {
+                Console.Write(p.Data + "==>");
+                p = p.Next;
+            }
+            #endregion
+
+            Console.ReadLine();
+        }
+    }
+}
diff --git a/LinkedList/LinkedList/SingleLinkList.cs b/LinkedList/LinkedList/SingleLinkList.cs
new file mode 100644
index 0000000000000000000000000000000000000000..1a3f54fb66e2540fc8bd5054eafca420b611c92b
--- /dev/null
+++ b/LinkedList/LinkedList/SingleLinkList.cs
@@ -0,0 +1,236 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.ExceptionServices;
+using System.Text;
+
+namespace LinkedList
+{
+   public class SingleLinkList<T>: IFactory<T>where T:IComparable
+    {
+        public SingleLinkNodes<T> Head { get; set; }
+        public int Length { get; set; }
+        public SingleLinkNodes<T> Tail { get; set; }
+        public SingleLinkList()
+        {
+            this.Head = new SingleLinkNodes<T>();
+        }
+
+        #region Insert
+        /// <summary>
+        /// 头节点插入
+        /// </summary>
+        /// <param name="value"></param>
+        public  void AddFront(T value)
+        {
+            SingleLinkNodes<T> targetNode = new SingleLinkNodes<T>(value);
+            if (targetNode != null)
+            {
+                targetNode.Next = this.Head.Next;
+                this.Head.Next = targetNode;
+            }
+            if (this.Head.Next == null)
+            {
+                this.Tail = targetNode;
+            }
+            Length++;
+        }
+        /// <summary>
+        /// 尾节点插入值
+        /// </summary>
+        /// <param name="value"></param>
+        public void AddToRear(T value)
+        {
+            SingleLinkNodes<T> targetNode = new SingleLinkNodes<T>(value);
+            SingleLinkNodes<T> p = this.Head;
+            while (p.Next != null)
+            {
+                p = p.Next;
+            }
+            p.Next = targetNode;
+            Length++;
+            this.Tail = targetNode;
+        }
+        #endregion
+
+        #region Print
+        /// <summary>
+        /// 输出节点
+        /// </summary>
+        public void PrintItems()
+        {
+            SingleLinkNodes<T> p = this.Head.Next;
+            while (p != null && p != this.Head)
+            {
+                Console.Write(p.Data + "==>");
+                p = p.Next;
+            }
+            Console.WriteLine();
+        }
+        #endregion
+
+        #region Delete
+        /// <summary>
+        /// 删除节点
+        /// </summary>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public bool DeleteItems(T value)
+        {
+
+            SingleLinkNodes<T> p = this.Head;
+            while (p.Next != null && !p.Next.Data.Equals(value))
+            {
+                p = p.Next;
+            }
+            if (p.Next.Next == null)
+            {
+                this.Tail = p;
+            }
+            if (p.Next.Data.Equals(value))
+            {
+                p.Next = p.Next.Next;
+                Length--;
+                return true;
+            }
+            return false;
+        }
+        #endregion
+
+        #region FindItem
+        /// <summary>
+        /// 查找元素
+        /// </summary>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public bool FindItem(T value)
+        {
+            SingleLinkNodes<T> p = this.Head;
+            while (p.Next != null && !p.Next.Data.Equals(value))
+            {
+                p = p.Next;
+            }
+            if (p.Next.Data.Equals(value))
+            {
+                return true;
+            }
+            return false;
+        }
+        #endregion
+
+        #region Length
+        /// <summary>
+        /// 返回链表长度
+        /// </summary>
+        /// <returns></returns>
+        public int Size()
+        {
+            if (this.Head != null)
+            {
+                SingleLinkNodes<T> p = this.Head;
+                int len = 0;
+                while (p.Next != null)
+                {
+                    p = p.Next;
+                    len++;
+                }
+                return len;
+            }
+            return 0;
+        }
+        #endregion
+
+        #region Revert
+        /// <summary>
+        /// 反转字符串
+        /// </summary>
+        public SingleLinkList<T> RevertSingleLinkList()
+        {
+            SingleLinkNodes<T> p = this.Head;
+            SingleLinkNodes<T> q = this.Head.Next;
+            p.Next = null;
+
+            while (q != null && q.Next != null)
+            {
+                SingleLinkNodes<T> r = q.Next;
+
+                q.Next = p;
+                p = q;
+                q = r;
+            }
+
+            if (q != null && q.Next == null)
+            {
+                q.Next = p;
+            }
+          
+            SingleLinkList<T> master = new SingleLinkList<T>();
+            master.Head.Next = p;
+            return master;
+
+        }
+
+        #endregion
+
+        #region FindNode
+        /// <summary>
+        /// 寻找当前节点开始的第K个节点并返回
+        /// </summary>
+        /// <param name="k"></param>
+        /// <returns></returns>
+        public SingleLinkNodes<T> FindKth(int k)
+        {
+            int count = 1;
+
+            SingleLinkNodes<T> p = this.Head.Next;
+
+            while (p != null && p.Next != this.Head && count < k)
+            {
+                count++;
+                p = p.Next;
+            }
+
+            if (count == k)
+            {
+                return p;
+            }
+
+            return null;
+        }
+
+        /// <summary>
+        /// 寻找单链表当中的倒数第K个节点
+        /// </summary>
+        /// <param name="k"></param>
+        /// <returns></returns>
+        public SingleLinkNodes<T> FindLastKth(int k)
+        {
+            SingleLinkNodes<T> first = this.Head.Next;
+            SingleLinkNodes<T> second = this.Head.Next;
+
+            int countFirst = 1;
+
+            while (first != null && first.Next != null && countFirst < k)
+            {
+                countFirst++;
+                first = first.Next;
+            }
+
+            if (countFirst == k)
+            {
+                while (first != null && first.Next != null)
+                {
+                    first = first.Next;
+                    second = second.Next;
+                }
+
+                return second;
+            }
+
+            return null;
+        }
+        #endregion
+
+
+
+    }
+}
diff --git a/LinkedList/LinkedList/SingleLinkNodes.cs b/LinkedList/LinkedList/SingleLinkNodes.cs
new file mode 100644
index 0000000000000000000000000000000000000000..daa88c2f771d422bb602102411e87e8a58b64362
--- /dev/null
+++ b/LinkedList/LinkedList/SingleLinkNodes.cs
@@ -0,0 +1,94 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace LinkedList
+{
+   public class SingleLinkNodes<T>where T:IComparable
+    {
+        public T Data { get; set; }
+        public SingleLinkNodes<T> Next { get; set; }
+        public SingleLinkNodes(T data)
+        {
+            this.Data = data;
+        }
+        public SingleLinkNodes(T data,SingleLinkNodes<T> next)
+        {
+            this.Data = data;
+            this.Next = next;
+        }
+
+        public SingleLinkNodes()
+        {
+        }
+        public void InsertAfter(T data)
+        {
+            SingleLinkNodes<T> p = this;
+
+            while (p.Next != null)
+            {
+                p = p.Next;
+            }
+
+            SingleLinkNodes<T> newNode = new SingleLinkNodes<T>(data);
+
+            p.Next = newNode;
+        }
+
+        public SingleLinkNodes<T> Combine(SingleLinkNodes<T> secondLinkList)
+        {
+            if (secondLinkList == null) return this;
+
+            SingleLinkNodes<T> first = this;
+            SingleLinkNodes<T> second = secondLinkList;
+
+            SingleLinkNodes<T> newHead = null;
+
+            // 第一个链表的第一个元素大，我们取第二个链表的第一个元素为头
+            if (first.Data.CompareTo( second.Data)>0)
+            {
+                newHead = second;
+                second = second.Next;
+            }
+            // 第二个链表的第一个元素大，我们取第一个链表的第一个元素为头
+            else
+            {
+                newHead = first;
+                first = first.Next;
+            }
+
+            SingleLinkNodes<T> temp = newHead;
+
+            while (first != null && second != null)
+            {
+                if (first.Data.CompareTo(second.Data)>0)
+                {
+                    //调整newhead所在的链表，将second挂上去
+                    temp.Next = second;
+                    second = second.Next;
+                }
+                else
+                {
+                    //调整newhead所在的链表，将first挂上去
+                    temp.Next = first;
+                    first = first.Next;
+                }
+
+                temp = temp.Next;
+            }
+
+            //第一个链表没有结束，第二个链表已经结束了
+            if (first != null)
+            {
+                temp.Next = first;
+            }
+
+            if (second != null)
+            {
+                temp.Next = second;
+            }
+
+            return newHead;
+        }
+    }
+}
diff --git a/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.deps.json b/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.deps.json
new file mode 100644
index 0000000000000000000000000000000000000000..bf8cbfaca6a1555db75b3cc9f0467b398aef7bf2
--- /dev/null
+++ b/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.deps.json
@@ -0,0 +1,23 @@
+{
+  "runtimeTarget": {
+    "name": ".NETCoreApp,Version=v3.1",
+    "signature": ""
+  },
+  "compilationOptions": {},
+  "targets": {
+    ".NETCoreApp,Version=v3.1": {
+      "LinkedList/1.0.0": {
+        "runtime": {
+          "LinkedList.dll": {}
+        }
+      }
+    }
+  },
+  "libraries": {
+    "LinkedList/1.0.0": {
+      "type": "project",
+      "serviceable": false,
+      "sha512": ""
+    }
+  }
+}
\ No newline at end of file
diff --git a/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.dll b/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.dll
new file mode 100644
index 0000000000000000000000000000000000000000..d267d0f7f3be982380f97447d9bea36975cbf7fa
Binary files /dev/null and b/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.dll differ
diff --git a/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.exe b/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.exe
new file mode 100644
index 0000000000000000000000000000000000000000..ac0131645c333d93f9ddf14389ed53c055570831
Binary files /dev/null and b/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.exe differ
diff --git a/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.pdb b/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.pdb
new file mode 100644
index 0000000000000000000000000000000000000000..870e2182ad02cb3183526a81ba2bcdc6910f8741
Binary files /dev/null and b/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.pdb differ
diff --git a/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.runtimeconfig.dev.json b/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.runtimeconfig.dev.json
new file mode 100644
index 0000000000000000000000000000000000000000..6e4c2dfeb923b2456256d1ec1c2366c3b4589ebd
--- /dev/null
+++ b/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.runtimeconfig.dev.json
@@ -0,0 +1,10 @@
+{
+  "runtimeOptions": {
+    "additionalProbingPaths": [
+      "C:\\Users\\Administrator\\.dotnet\\store\\|arch|\\|tfm|",
+      "C:\\Users\\Administrator\\.nuget\\packages",
+      "F:\\Microsoft\\Xamarin\\NuGet",
+      "C:\\Program Files\\dotnet\\sdk\\NuGetFallbackFolder"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.runtimeconfig.json b/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.runtimeconfig.json
new file mode 100644
index 0000000000000000000000000000000000000000..bc456d7868bb54ec1809da30e339cd43f0a8a09c
--- /dev/null
+++ b/LinkedList/LinkedList/bin/Debug/netcoreapp3.1/LinkedList.runtimeconfig.json
@@ -0,0 +1,9 @@
+{
+  "runtimeOptions": {
+    "tfm": "netcoreapp3.1",
+    "framework": {
+      "name": "Microsoft.NETCore.App",
+      "version": "3.1.0"
+    }
+  }
+}
\ No newline at end of file
diff --git a/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/.NETCoreApp,Version=v3.1.AssemblyAttributes.cs b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/.NETCoreApp,Version=v3.1.AssemblyAttributes.cs
new file mode 100644
index 0000000000000000000000000000000000000000..ad8dfe1a6310302587a2d0c0111d81b250eb4105
--- /dev/null
+++ b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/.NETCoreApp,Version=v3.1.AssemblyAttributes.cs
@@ -0,0 +1,4 @@
+// <autogenerated />
+using System;
+using System.Reflection;
+[assembly: global::System.Runtime.Versioning.TargetFrameworkAttribute(".NETCoreApp,Version=v3.1", FrameworkDisplayName = "")]
diff --git a/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.AssemblyInfo.cs b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.AssemblyInfo.cs
new file mode 100644
index 0000000000000000000000000000000000000000..6b65dd07c7f52aebb89f29b876182413708ced26
--- /dev/null
+++ b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.AssemblyInfo.cs
@@ -0,0 +1,23 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     此代码由工具生成。
+//     运行时版本:4.0.30319.42000
+//
+//     对此文件的更改可能会导致不正确的行为，并且如果
+//     重新生成代码，这些更改将会丢失。
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Reflection;
+
+[assembly: System.Reflection.AssemblyCompanyAttribute("LinkedList")]
+[assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
+[assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
+[assembly: System.Reflection.AssemblyProductAttribute("LinkedList")]
+[assembly: System.Reflection.AssemblyTitleAttribute("LinkedList")]
+[assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
+
+// 由 MSBuild WriteCodeFragment 类生成。
+
diff --git a/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.AssemblyInfoInputs.cache b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.AssemblyInfoInputs.cache
new file mode 100644
index 0000000000000000000000000000000000000000..ae0e2f058f1b8caabf35cbf6d45a3b37fa1abbbc
--- /dev/null
+++ b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.AssemblyInfoInputs.cache
@@ -0,0 +1 @@
+cd464f278748a64a5a0c1766f1e7255f44453e1c
diff --git a/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.assets.cache b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.assets.cache
new file mode 100644
index 0000000000000000000000000000000000000000..e15103d277901b30c7c4a7f00ab4a2343f370014
Binary files /dev/null and b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.assets.cache differ
diff --git a/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.csproj.CoreCompileInputs.cache b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.csproj.CoreCompileInputs.cache
new file mode 100644
index 0000000000000000000000000000000000000000..2e1bebbd2e9cbc771b2d55af97bac92c060ebf5d
--- /dev/null
+++ b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.csproj.CoreCompileInputs.cache
@@ -0,0 +1 @@
+92ae85e7ed578de8616a40c1d033fb522bdef194
diff --git a/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.csproj.FileListAbsolute.txt b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.csproj.FileListAbsolute.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c58534b92454f85688af877c9fb2cea585e5a7d7
--- /dev/null
+++ b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.csproj.FileListAbsolute.txt
@@ -0,0 +1,25 @@
+E:\项目\LinkedList\LinkedList\bin\Debug\netcoreapp3.1\LinkedList.exe
+E:\项目\LinkedList\LinkedList\bin\Debug\netcoreapp3.1\LinkedList.deps.json
+E:\项目\LinkedList\LinkedList\bin\Debug\netcoreapp3.1\LinkedList.runtimeconfig.json
+E:\项目\LinkedList\LinkedList\bin\Debug\netcoreapp3.1\LinkedList.runtimeconfig.dev.json
+E:\项目\LinkedList\LinkedList\bin\Debug\netcoreapp3.1\LinkedList.dll
+E:\项目\LinkedList\LinkedList\bin\Debug\netcoreapp3.1\LinkedList.pdb
+E:\项目\LinkedList\LinkedList\obj\Debug\netcoreapp3.1\LinkedList.AssemblyInfoInputs.cache
+E:\项目\LinkedList\LinkedList\obj\Debug\netcoreapp3.1\LinkedList.AssemblyInfo.cs
+E:\项目\LinkedList\LinkedList\obj\Debug\netcoreapp3.1\LinkedList.csproj.CoreCompileInputs.cache
+E:\项目\LinkedList\LinkedList\obj\Debug\netcoreapp3.1\LinkedList.dll
+E:\项目\LinkedList\LinkedList\obj\Debug\netcoreapp3.1\LinkedList.pdb
+E:\项目\LinkedList\LinkedList\obj\Debug\netcoreapp3.1\LinkedList.genruntimeconfig.cache
+C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\obj\Debug\netcoreapp3.1\LinkedList.csprojAssemblyReference.cache
+C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\obj\Debug\netcoreapp3.1\LinkedList.AssemblyInfoInputs.cache
+C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\obj\Debug\netcoreapp3.1\LinkedList.AssemblyInfo.cs
+C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\obj\Debug\netcoreapp3.1\LinkedList.csproj.CoreCompileInputs.cache
+C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\obj\Debug\netcoreapp3.1\LinkedList.dll
+C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\obj\Debug\netcoreapp3.1\LinkedList.pdb
+C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\bin\Debug\netcoreapp3.1\LinkedList.exe
+C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\bin\Debug\netcoreapp3.1\LinkedList.deps.json
+C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\bin\Debug\netcoreapp3.1\LinkedList.runtimeconfig.json
+C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\bin\Debug\netcoreapp3.1\LinkedList.runtimeconfig.dev.json
+C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\bin\Debug\netcoreapp3.1\LinkedList.dll
+C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\bin\Debug\netcoreapp3.1\LinkedList.pdb
+C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\obj\Debug\netcoreapp3.1\LinkedList.genruntimeconfig.cache
diff --git a/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.csprojAssemblyReference.cache b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.csprojAssemblyReference.cache
new file mode 100644
index 0000000000000000000000000000000000000000..a0fbfd12797557adefa2aaaacd9d5126dec64303
Binary files /dev/null and b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.csprojAssemblyReference.cache differ
diff --git a/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.dll b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.dll
new file mode 100644
index 0000000000000000000000000000000000000000..d267d0f7f3be982380f97447d9bea36975cbf7fa
Binary files /dev/null and b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.dll differ
diff --git a/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.exe b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.exe
new file mode 100644
index 0000000000000000000000000000000000000000..ac0131645c333d93f9ddf14389ed53c055570831
Binary files /dev/null and b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.exe differ
diff --git a/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.genruntimeconfig.cache b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.genruntimeconfig.cache
new file mode 100644
index 0000000000000000000000000000000000000000..34bedab819ef1631d37d6e87ef9a716c545a105e
--- /dev/null
+++ b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.genruntimeconfig.cache
@@ -0,0 +1 @@
+86c8e15dd33445635927cfaf398408205fd11473
diff --git a/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.pdb b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.pdb
new file mode 100644
index 0000000000000000000000000000000000000000..870e2182ad02cb3183526a81ba2bcdc6910f8741
Binary files /dev/null and b/LinkedList/LinkedList/obj/Debug/netcoreapp3.1/LinkedList.pdb differ
diff --git a/LinkedList/LinkedList/obj/LinkedList.csproj.nuget.cache b/LinkedList/LinkedList/obj/LinkedList.csproj.nuget.cache
new file mode 100644
index 0000000000000000000000000000000000000000..fe50d5ae026f80d629e40c79f9e10ced500ba150
--- /dev/null
+++ b/LinkedList/LinkedList/obj/LinkedList.csproj.nuget.cache
@@ -0,0 +1,5 @@
+{
+  "version": 1,
+  "dgSpecHash": "MkYFFgXG6LiOnnMJ9put51V01HrL3m7bMKhAa9zM26oRMPNZGutcaQ9d2FplREtGWPyC5zqhE7wiKJJSIyF7lQ==",
+  "success": true
+}
\ No newline at end of file
diff --git a/LinkedList/LinkedList/obj/LinkedList.csproj.nuget.dgspec.json b/LinkedList/LinkedList/obj/LinkedList.csproj.nuget.dgspec.json
new file mode 100644
index 0000000000000000000000000000000000000000..9692ff0318a64a4d29b11fa010e8bbda76bd870a
--- /dev/null
+++ b/LinkedList/LinkedList/obj/LinkedList.csproj.nuget.dgspec.json
@@ -0,0 +1,65 @@
+{
+  "format": 1,
+  "restore": {
+    "C:\\Users\\Administrator\\Desktop\\新建文件夹 (2)\\lec02-linkedlist\\LinkedList\\LinkedList\\LinkedList.csproj": {}
+  },
+  "projects": {
+    "C:\\Users\\Administrator\\Desktop\\新建文件夹 (2)\\lec02-linkedlist\\LinkedList\\LinkedList\\LinkedList.csproj": {
+      "version": "1.0.0",
+      "restore": {
+        "projectUniqueName": "C:\\Users\\Administrator\\Desktop\\新建文件夹 (2)\\lec02-linkedlist\\LinkedList\\LinkedList\\LinkedList.csproj",
+        "projectName": "LinkedList",
+        "projectPath": "C:\\Users\\Administrator\\Desktop\\新建文件夹 (2)\\lec02-linkedlist\\LinkedList\\LinkedList\\LinkedList.csproj",
+        "packagesPath": "C:\\Users\\Administrator\\.nuget\\packages\\",
+        "outputPath": "C:\\Users\\Administrator\\Desktop\\新建文件夹 (2)\\lec02-linkedlist\\LinkedList\\LinkedList\\obj\\",
+        "projectStyle": "PackageReference",
+        "fallbackFolders": [
+          "F:\\Microsoft\\Xamarin\\NuGet\\",
+          "C:\\Program Files\\dotnet\\sdk\\NuGetFallbackFolder"
+        ],
+        "configFilePaths": [
+          "C:\\Users\\Administrator\\AppData\\Roaming\\NuGet\\NuGet.Config",
+          "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.Offline.config",
+          "C:\\Program Files (x86)\\NuGet\\Config\\Xamarin.Offline.config"
+        ],
+        "originalTargetFrameworks": [
+          "netcoreapp3.1"
+        ],
+        "sources": {
+          "C:\\Program Files (x86)\\Microsoft SDKs\\NuGetPackages\\": {},
+          "https://api.nuget.org/v3/index.json": {}
+        },
+        "frameworks": {
+          "netcoreapp3.1": {
+            "projectReferences": {}
+          }
+        },
+        "warningProperties": {
+          "warnAsError": [
+            "NU1605"
+          ]
+        }
+      },
+      "frameworks": {
+        "netcoreapp3.1": {
+          "imports": [
+            "net461",
+            "net462",
+            "net47",
+            "net471",
+            "net472",
+            "net48"
+          ],
+          "assetTargetFallback": true,
+          "warn": true,
+          "frameworkReferences": {
+            "Microsoft.NETCore.App": {
+              "privateAssets": "all"
+            }
+          },
+          "runtimeIdentifierGraphPath": "C:\\Program Files\\dotnet\\sdk\\3.1.301\\RuntimeIdentifierGraph.json"
+        }
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/LinkedList/LinkedList/obj/LinkedList.csproj.nuget.g.props b/LinkedList/LinkedList/obj/LinkedList.csproj.nuget.g.props
new file mode 100644
index 0000000000000000000000000000000000000000..b30120d847b48a4611523f7ccb7c592606586388
--- /dev/null
+++ b/LinkedList/LinkedList/obj/LinkedList.csproj.nuget.g.props
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
+    <RestoreSuccess Condition=" '$(RestoreSuccess)' == '' ">True</RestoreSuccess>
+    <RestoreTool Condition=" '$(RestoreTool)' == '' ">NuGet</RestoreTool>
+    <ProjectAssetsFile Condition=" '$(ProjectAssetsFile)' == '' ">C:\Users\Administrator\Desktop\新建文件夹 (2)\lec02-linkedlist\LinkedList\LinkedList\obj\project.assets.json</ProjectAssetsFile>
+    <NuGetPackageRoot Condition=" '$(NuGetPackageRoot)' == '' ">$(UserProfile)\.nuget\packages\</NuGetPackageRoot>
+    <NuGetPackageFolders Condition=" '$(NuGetPackageFolders)' == '' ">C:\Users\Administrator\.nuget\packages\;F:\Microsoft\Xamarin\NuGet\;C:\Program Files\dotnet\sdk\NuGetFallbackFolder</NuGetPackageFolders>
+    <NuGetProjectStyle Condition=" '$(NuGetProjectStyle)' == '' ">PackageReference</NuGetProjectStyle>
+    <NuGetToolVersion Condition=" '$(NuGetToolVersion)' == '' ">4.9.3</NuGetToolVersion>
+  </PropertyGroup>
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+  </PropertyGroup>
+</Project>
\ No newline at end of file
diff --git a/LinkedList/LinkedList/obj/LinkedList.csproj.nuget.g.targets b/LinkedList/LinkedList/obj/LinkedList.csproj.nuget.g.targets
new file mode 100644
index 0000000000000000000000000000000000000000..53cfaa19b16f3769b2bfc33db3b5c0053c16fdba
--- /dev/null
+++ b/LinkedList/LinkedList/obj/LinkedList.csproj.nuget.g.targets
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+  </PropertyGroup>
+</Project>
\ No newline at end of file
diff --git a/LinkedList/LinkedList/obj/project.assets.json b/LinkedList/LinkedList/obj/project.assets.json
new file mode 100644
index 0000000000000000000000000000000000000000..327416cc347fc69352e3793ba4758f1721b675e9
--- /dev/null
+++ b/LinkedList/LinkedList/obj/project.assets.json
@@ -0,0 +1,61 @@
+{
+  "version": 3,
+  "targets": {
+    ".NETCoreApp,Version=v3.1": {}
+  },
+  "libraries": {},
+  "projectFileDependencyGroups": {
+    ".NETCoreApp,Version=v3.1": []
+  },
+  "packageFolders": {
+    "C:\\Users\\Administrator\\.nuget\\packages\\": {},
+    "F:\\Microsoft\\Xamarin\\NuGet\\": {},
+    "C:\\Program Files\\dotnet\\sdk\\NuGetFallbackFolder": {}
+  },
+  "project": {
+    "version": "1.0.0",
+    "restore": {
+      "projectUniqueName": "C:\\Users\\Administrator\\Desktop\\新建文件夹 (2)\\lec02-linkedlist\\LinkedList\\LinkedList\\LinkedList.csproj",
+      "projectName": "LinkedList",
+      "projectPath": "C:\\Users\\Administrator\\Desktop\\新建文件夹 (2)\\lec02-linkedlist\\LinkedList\\LinkedList\\LinkedList.csproj",
+      "packagesPath": "C:\\Users\\Administrator\\.nuget\\packages\\",
+      "outputPath": "C:\\Users\\Administrator\\Desktop\\新建文件夹 (2)\\lec02-linkedlist\\LinkedList\\LinkedList\\obj\\",
+      "projectStyle": "PackageReference",
+      "fallbackFolders": [
+        "F:\\Microsoft\\Xamarin\\NuGet\\",
+        "C:\\Program Files\\dotnet\\sdk\\NuGetFallbackFolder"
+      ],
+      "configFilePaths": [
+        "C:\\Users\\Administrator\\AppData\\Roaming\\NuGet\\NuGet.Config",
+        "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.Offline.config",
+        "C:\\Program Files (x86)\\NuGet\\Config\\Xamarin.Offline.config"
+      ],
+      "originalTargetFrameworks": [
+        "netcoreapp3.1"
+      ],
+      "sources": {
+        "C:\\Program Files (x86)\\Microsoft SDKs\\NuGetPackages\\": {},
+        "https://api.nuget.org/v3/index.json": {}
+      },
+      "frameworks": {
+        "netcoreapp3.1": {
+          "projectReferences": {}
+        }
+      },
+      "warningProperties": {
+        "warnAsError": [
+          "NU1605"
+        ]
+      }
+    },
+    "frameworks": {
+      "netcoreapp3.1": {
+        "imports": [
+          "net461"
+        ],
+        "assetTargetFallback": true,
+        "warn": true
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/LinkedList/LinkedList/obj/project.nuget.cache b/LinkedList/LinkedList/obj/project.nuget.cache
new file mode 100644
index 0000000000000000000000000000000000000000..e57c98b5c42ccb70e300fe759412f3b745059351
--- /dev/null
+++ b/LinkedList/LinkedList/obj/project.nuget.cache
@@ -0,0 +1,8 @@
+{
+  "version": 2,
+  "dgSpecHash": "VVa7xaEdkUEVPSVdGPccBqfjhPabgTVRQWBN2JCja6gmZ7V9QLwhz6SPCbojRVJRaT8aPAx8Nrp4ZJ7aWd78yA==",
+  "success": true,
+  "projectFilePath": "C:\\Users\\Administrator\\Desktop\\新建文件夹 (2)\\lec02-linkedlist\\LinkedList\\LinkedList\\LinkedList.csproj",
+  "expectedPackageFiles": [],
+  "logs": []
+}
\ No newline at end of file