using System;

using System.Runtime.InteropServices;

public class Program

{

    [StructLayout(LayoutKind.Explicit)]

    struct my_struct {

        [FieldOffset(0)]

        public UInt32 my_uint;

​

        [FieldOffset(0)]

        public bool other_field; // try changing the type of this field (eg byte)

    }

    public static void Main()

    {

        var test = new my_struct { my_uint = 0xDEADBEEF };

        byte[] data = new byte[Marshal.SizeOf(test)];

        IntPtr buffer = Marshal.AllocHGlobal(data.Length);

        Marshal.StructureToPtr(test, buffer, false);

        Marshal.Copy(buffer, data, 0, data.Length);

        Marshal.FreeHGlobal(buffer);

​

        foreach (byte b in data) {

            Console.Write("{0:X2} ", b);

        }

        Console.WriteLine();

    }

}