C# 中 Union的实现

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/Vblegend_2013/article/details/81566078

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;

namespace ConsoleApplication
{
    [StructLayout(LayoutKind.Explicit, Size = 4)]
    public struct Union
    {
        [FieldOffset(0)]
        public Byte b0;
        [FieldOffset(1)]
        public Byte b1;
        [FieldOffset(2)]
        public Byte b2;
        [FieldOffset(3)]
        public Byte b3;
        [FieldOffset(0)]
        public Int32 i;
        [FieldOffset(0)]
        public Single f;
    }
}

            Union u = new Union();
            u.i = 1024;
            Console.WriteLine(u.b1 == 4);