- 增加 ISelect.WhereCascade 实现多表查询时，向每个表中附加条件；

- 增加 Examples 项目 base_entity，利用 BaseEntity 实现简洁的数据库操作；

Examples/base_entity/Entities/User.cs

@@ -0,0 +1,91 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+public class UserGroup : BaseEntity<UserGroup, int>
+{
+    /// <summary>
+    /// 组名
+    /// </summary>
+    public string GroupName { get; set; }
+
+    public List<User1> User1s { get; set; }
+
+    public List<User2> User2s { get; set; }
+}
+
+public class Role : BaseEntity<Role, string>
+{
+    public List<User1> User1s { get; set; }
+}
+public class RoleUser1 : BaseEntity<RoleUser1>
+{
+    public string RoleId { get; set; }
+    public Guid User1Id { get; set; }
+
+    public Role Role { get; set; }
+    public User1 User1 { get; set; }
+}
+
+public class User1 : BaseEntity<User1, Guid>
+{
+    public int GroupId { get; set; }
+    public UserGroup Group { get; set; }
+
+    public List<Role> Roles { get; set; }
+
+    /// <summary>
+    /// 登陆名
+    /// </summary>
+    public string Username { get; set; }
+
+    /// <summary>
+    /// 昵称
+    /// </summary>
+    public string Nickname { get; set; }
+
+    /// <summary>
+    /// 头像
+    /// </summary>
+    public string Avatar { get; set; }
+
+    /// <summary>
+    /// 描述
+    /// </summary>
+    public string Description { get; set; }
+}
+
+public class User2 : BaseEntity<User2, Guid, int>
+{
+    static User2()
+    {
+        User2.Orm.CodeFirst.ConfigEntity<User2>(t =>
+        {
+            t.Property(a => a.PkId1).Name("UserId");
+            t.Property(a => a.PkId2).Name("Index");
+        });
+    }
+
+    public int GroupId { get; set; }
+    public UserGroup Group { get; set; }
+
+    /// <summary>
+    /// 登陆名
+    /// </summary>
+    public string Username { get; set; }
+
+    /// <summary>
+    /// 昵称
+    /// </summary>
+    public string Nickname { get; set; }
+
+    /// <summary>
+    /// 头像
+    /// </summary>
+    public string Avatar { get; set; }
+
+    /// <summary>
+    /// 描述
+    /// </summary>
+    public string Description { get; set; }
+}