FieldOffset as unsafe

fieldoffset.cs

using System;
using System.Runtime.InteropServices;

namespace FieldOffsetSample
{
    class Program
    {
        static void Main(string[] args)
        {
            MyStruct myStruct = default;
            myStruct.Byte0 = 1;
            myStruct.Byte4 = 2;
            DoIt(myStruct.Bool0, myStruct.Bool4);
        }

        static void DoIt(bool a, bool b)
        {
            Console.WriteLine($"a is {a}"); // prints 'True'
            Console.WriteLine($"b is {b}"); // prints 'True'
            Console.WriteLine($"a && b is {a && b}"); // prints 'False'
        }
    }

    [StructLayout(LayoutKind.Explicit)]
    struct MyStruct
    {
        [FieldOffset(0)]
        public byte Byte0;
        [FieldOffset(0)]
        public bool Bool0;

        [FieldOffset(4)]
        public byte Byte4;
        [FieldOffset(4)]
        public bool Bool4;
    }
}

Need to figure out how to work this in to the document being created at dotnet/runtime#41418.