using System;

public class Program

{

public static   void Main()

{

     var sysRankLog=new SysRankLog();

     DB<BaseTable>.Delete(sysRankLog);

     var product=new Product();

     DB<BaseTable>.Delete(product);

}

}

​

public class SysRankLog:BaseTableID

{

}

​

public class Product:BaseTableDeleteFlag

{

}

​

​

public class DB<BaseTable> 

{

  public static void Delete(BaseTable table)

  {

    if(table is BaseTableDeleteFlag||table is BaseTableTimeAndFlag)

    {

     Console.WriteLine(" 软删除");

    }

    else 

    {

    Console.WriteLine(" 物理删除");

    }

  }

}

​

public class BaseTable

    {

        public string ToJson()

        {

           return "json";

        }

    }

​

    public class BaseTableID : BaseTable

    {

        public int id { get; set; }

​

    }

​

    public class BaseTableDeleteFlag : BaseTableID

    {

        public bool deleteflag { get; set; }

​

    }

​

    public class BaseTableTimeAndFlag : BaseTableDeleteFlag

    {

        public DateTime createtime { get; set; }

        public DateTime updatetime { get; set; }

    }

​

​