Biegral Blog

http://www.cnblogs.com/MigCoder/p/3500747.html

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WPF_fist.MyClass
{
    class Foo
    {
        private string TestString()
        {
            return "I'm a string";
        }
        private int TestInt()
        {
            return 100;
        }

        public TestHelper Test()
        {

            //返回一个TestHelper对象，由该对象去隐式转换目标值
            return new TestHelper(this);
        }

        public struct TestHelper
        {
            Foo m_host;
            public TestHelper(Foo host)
            {
                m_host = host;
            }

            //实现TestHelper与int的隐式转换
            public static implicit operator int(TestHelper helper)
            {
                return helper.m_host.TestInt();
            }

            //实现TestHelper与string的隐式转换
            public static implicit operator string(TestHelper helper)
            {
                return helper.m_host.TestString();
            }
        } 



    }

  
}

MyClass.Foo Foo = new MyClass.Foo();
int i = Foo.Test();
string str= Foo.Test();