pk3DS/pk3DS.Core/StructConverter.cs

using System;
using System.Runtime.InteropServices;

namespace pk3DS.Core
{
    public static class StructConverter
    {
        public static T ToStructure<T>(this byte[] bytes) where T : struct
        {
            GCHandle handle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
            T obj = (T)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(T));
            handle.Free();
            return obj;
        }
        public static byte[] ToBytes<T>(this T obj) where T : struct
        {
            int size = Marshal.SizeOf(obj);
            byte[] arr = new byte[size];

            IntPtr ptr = Marshal.AllocHGlobal(size);
            Marshal.StructureToPtr(obj, ptr, true);
            Marshal.Copy(ptr, arr, 0, size);
            Marshal.FreeHGlobal(ptr);
            return arr;
        }
    }
}