diff --git "a/DotNet.Utilities/\345\255\227\347\254\246\344\270\262/StringHelper.cs" "b/DotNet.Utilities/\345\255\227\347\254\246\344\270\262/StringHelper.cs"
index 816153639917740aa27433dc2bee5a42f15451b6..c3a738955c394fc5ae70f11cfbd1147e08c3f377 100644
--- "a/DotNet.Utilities/\345\255\227\347\254\246\344\270\262/StringHelper.cs"
+++ "b/DotNet.Utilities/\345\255\227\347\254\246\344\270\262/StringHelper.cs"
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Text;
 using System.Text.RegularExpressions;
@@ -64,22 +64,11 @@ namespace DotNet.Utilities
         /// <param name="list"></param>
         /// <param name="speater"></param>
         /// <returns></returns>
-        public static string GetArrayStr(List<string> list, string speater)
+        public static string GetArrayStr(List<string> list, string speater=",")
         {
-            StringBuilder sb = new StringBuilder();
-            for (int i = 0; i < list.Count; i++)
-            {
-                if (i == list.Count - 1)
-                {
-                    sb.Append(list[i]);
-                }
-                else
-                {
-                    sb.Append(list[i]);
-                    sb.Append(speater);
-                }
-            }
-            return sb.ToString();
+
+            return string.Join(speater, list);
+
         }
         /// <summary>
         /// 得到数组列表以逗号分隔的字符串
@@ -563,5 +552,6 @@ namespace DotNet.Utilities
             return false;
         }
         #endregion
+       
     }
 }