C#结构体怎么实现位域

Question

在C中带位域的结构体怎么转换成C#的结构体，如下面的结构体
struct STU
{
INT8U  a : 4;
INT8U b : 4;
INT16U c;
INT16U  d : 4;
INT16U  e : 12;
}

Answer 1

[Flags]
    public enum Permission
    {
        View = 1,
        Create = 2,
        Edit = 4,
        Delete = 8,
        All = View | Create | Edit | Delete
    }

Answer 2

http://www.cnblogs.com/cntom/archive/2011/08/17/2143046.html

Answer 3

自己写了一个类来实现了，贴出来大家给点意见
[StructLayout(LayoutKind.Explicit,Size=5)]
    class STU
    {
        [FieldOffset(0)]
        byte _value1=0;        [FieldOffset(1)]
        UInt16 _value2=0;        [FieldOffset(3)]
        UInt16 _value3=0;        public int a
        {
            set { _value1 = Convert.ToByte((_value1 & 0xF0) | (value & 0x0F)); }
            get { return (_value1 & 0x0F); }
        }        public int b
        {
            set { _value1 = Convert.ToByte((_value1 & 0x0F) | ((value & 0x0F) << 4)); }
            get { return ((_value1 & 0xF0) >> 4); }
        }        public int c
        {
            set { _value2 = Convert.ToUInt16(value); }
            get { return _value2; }
        }
        public int d
        {
            set { _value3 = Convert.ToUInt16((_value3 & 0xFFF0) | (value & 0x000F)); }
            get { return (_value3 & 0x000F); }
        }        public int e
        {
            set { _value3 = Convert.ToUInt16((_value3 & 0x000F) | ((value & 0x0FFF) << 4)); }
            get { return ((_value3 & 0xFFF0) >> 4); }
        }
    }