小编LJ *_*ken的帖子

我已经定义了以下结构来模拟C++联合(最终将用于C++ Interop):

[StructLayout(LayoutKind.Sequential)]
internal struct STRUCT1
{
    public Guid guid;

    public String str1;
    public String str2;
}

[StructLayout(LayoutKind.Sequential)]
internal struct STRUCT2
{
    public Guid guid;

    public String str1;
    public String str2;

    public Int32 i1;
}

[StructLayout(LayoutKind.Explicit)]
internal struct MASTER_STRUCT_UNION
{
    [FieldOffset(0)]
    public STRUCT1 Struct1;

    [FieldOffset(0)]
    public STRUCT2 Struct2;
}

[StructLayout(LayoutKind.Sequential)]
internal struct MASTER_STRUCT
{
    public MASTER_STRUCT_UNION Union;
}

我编写了以下测试代码,它将值分配给Struct1.guid并测试相等性Struct2.guid:

class Class1
{
    public static void Test()
    {
        MASTER_STRUCT ms = new MASTER_STRUCT();

        bool match;
        ms.Union.Struct1.guid = …