action.SelectList 报错，
数据源是多表联查的sql语句，或者是视图的时候
报错
System.ArgumentException: 已添加了具有相同键的项
联查的表或视图，都有主键id，select tolist<>() 的时候会有多个id列

示例：

public class T_tmp
{
    public int id { get; set; }
    public string title { get; set; }

    public string content { get; set; }
}


internal class Program
{
    static void Main(string[] args)
    {
        string connString = $"Server=localhost;Database=ufdata_999_2014;User ID=sa;Password=123;";
        string sql = "SELECT a.id,a.title,b.content FROM dbo.t_tmp1 a LEFT JOIN dbo.t_tmp2 b ON a.id = b.pid";
        using (MAction action = new MAction(sql,connString))
        {
            List<T_tmp> list = action.SelectList<T_tmp>();
        }
        Console.ReadKey();
    }
}

/**************
CREATE TABLE t_tmp1
(
id INT IDENTITY(1,1),
title NVARCHAR(100)
,PRIMARY KEY(id)
)
GO

CREATE TABLE t_tmp2(
id INT IDENTITY(1,1),
pid int ,
content NVARCHAR(100)
,PRIMARY KEY(id)
)
GO

INSERT INTO dbo.t_tmp1(title)
VALUES(N'abc' -- title - nvarchar(100)
)
INSERT INTO dbo.t_tmp2(pid, content)
VALUES(1, -- pid - int
N'aaaaaa' -- content - nvarchar(100)
)
SELECT a.id,a.title,b.content FROM dbo.t_tmp1 a LEFT JOIN dbo.t_tmp2 b ON a.id = b.pid
*************/