diff --git "a/\346\262\210\345\256\207\346\263\263/12.10.md" "b/\346\262\210\345\256\207\346\263\263/12.10.md"
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+
+### 搜索
+列表.Select(x => x.键.Contains(值))
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diff --git "a/\346\262\210\345\256\207\346\263\263/12.13.md" "b/\346\262\210\345\256\207\346\263\263/12.13.md"
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+### 模型
+~~~
+安装 Entity Framework Core
+  dotnet add package Microsoft.EntityFrameworkCore.sqlServer
+
+创建实体类型
+~~~
+~~~
+创建数据库上下文(文件名带 DbContext)
+
+  public class 文件名 : DbContext
+  {
+    public DbSet<实体类型> 数据库表名 {get;set;}
+    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+    {
+        base.OnConfiguring(optionsBuilder);
+        optionsBuilder.UseSqlServer("server=实例名;database=数据库名;uid=sa;pwd=密码;TrustServerCertificate=True");
+    }
+  }
+  ~~~
+  ~~~
+数据库迁移
+dotnet tool install -g dotnet-ef
+dotnet add package Microsoft.EntityFrameworkCore.Design
+dotnet ef migrations add InitialCreate
+dotnet ef database update
+~~~
+增删改查 获取数据
+~~~
+private readonly 数据库上下文名字 实例名;
+public 控制器名称()
+{
+  实例名 = new 数据库上下文名字();
+}
+~~~
+增加数据
+~~~
+实例名.表名.Add()
+~~~
+删除数据
+~~~
+实例名.表名.Remove()
+~~~
+
+修改数据
+~~~
+实例名.表名.Updata()
+~~~
+增删改后要保存
+~~~
+实例名.SaveChanges()
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