C#中 Public static方法定义成接口类型是什么意思？

[chen3jian]

我想请问 public static JhFrame.Enterprise.Methods.MAdmin CreateAdmin() 方法定义成接口类型是什么意思？我不太懂，请大侠们帮忙解释一下！谢谢了先！

代码如下：

DataAccess.cs

        public static JhFrame.Enterprise.Methods.MAdmin CreateAdmin()
        {
            string className = path + ".Admin";
            return (JhFrame.Enterprise.Methods.MAdmin)Assembly.Load(path).CreateInstance(className);
        }

JhFrame.Enterprise.Methods.MAdmin MAdmin.cs

using System;
using System.Collections;
using System.Collections.Generic;
using JhFrame.Enterprise.Entity;

namespace JhFrame.Enterprise.Methods
{
    public interface MAdmin
    {
        Int32 RecordCount();
        Int32 PageCount();
    }
}

[默默_XL]

一般返回接口类型也是遵循里氏原则