Writing to unmanaged memory in C#

My line of work involves a great deal of interop, and although I've written a number of solutions for manipulating unmanaged memory in C#, this is probably the most elegant. Real programmers don't write safe C#.

PHP Code:

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using System;
using System.IO;
using System.Net;
using System.Runtime.InteropServices;
using System.Text;

namespace AngraMainyu.IO
{
    public static class UnmanagedMemoryStreamExtension
    {
        unsafe public static T Read<T>(this UnmanagedMemoryStream stream) where T : struct
        {
            var t = (T)Marshal.PtrToStructure((IntPtr)(stream.PositionPointer), typeof(T));
            stream.Position += Marshal.SizeOf(t);
            return t;
        }
        unsafe public static String ReadString(this UnmanagedMemoryStream stream)
        {
            var s = new String((sbyte*)stream.PositionPointer);
            stream.Position += s.Length;
            return s;
        }
        unsafe public static String ReadString(this UnmanagedMemoryStream stream, int length)
        {
            var s = new String((sbyte*)stream.PositionPointer, 0, length);
            stream.Position += s.Length;
            return s;
        }
        public static byte ReadByte(this UnmanagedMemoryStream stream)
        {
            return Read<byte>(stream);
        }
        public static sbyte ReadSByte(this UnmanagedMemoryStream stream)
        {
            return Read<sbyte>(stream);
        }
        public static short ReadInt16(this UnmanagedMemoryStream stream)
        {
            return Read<Int16>(stream);
        }
        public static ushort ReadUInt16(this UnmanagedMemoryStream stream)
        {
            return Read<UInt16>(stream);
        }
        public static int ReadInt32(this UnmanagedMemoryStream stream)
        {
            return Read<Int32>(stream);
        }
        public static uint ReadUInt32(this UnmanagedMemoryStream stream)
        {
            return Read<UInt32>(stream);
        }
        public static long ReadInt64(this UnmanagedMemoryStream stream)
        {
            return Read<Int64>(stream);
        }
        public static ulong ReadUInt64(this UnmanagedMemoryStream stream)
        {
            return Read<UInt64>(stream);
        }
        public static Single ReadSingle(this UnmanagedMemoryStream stream)
        {
            return Read<Single>(stream);
        }
        public static Double ReadDouble(this UnmanagedMemoryStream stream)
        {
            return Read<Double>(stream);
        }
        public static Decimal ReadDecimal(this UnmanagedMemoryStream stream)
        {
            return Read<Decimal>(stream);
        }
        unsafe public static void Write<T>(this UnmanagedMemoryStream stream, T value) where T : struct
        {
            var length = Marshal.SizeOf(value);

            if (stream.Position + length > stream.Length) {
                throw new NotSupportedException();
            } else {
                var handle = GCHandle.Alloc(value);
                for (int i = 0; i < length; i++) {
                    *(stream.PositionPointer + i) = ((byte*)handle.AddrOfPinnedObject())[i];
                }
                stream.Position += length;
                handle.Free();
            }
        }
        public static void WriteByte(this UnmanagedMemoryStream stream, byte value)
        {
            Write<byte>(stream, value);
        }
        public static void WriteSByte(this UnmanagedMemoryStream stream, sbyte value)
        {
            Write<sbyte>(stream, value);
        }
        public static void WriteInt16(this UnmanagedMemoryStream stream, short value)
        {
            Write<Int16>(stream, value);
        }
        public static void WriteUInt16(this UnmanagedMemoryStream stream, ushort value)
        {
            Write<UInt16>(stream, value);
        }
        public static void WriteInt32(this UnmanagedMemoryStream stream, int value)
        {
            Write<Int32>(stream, value);
        }
        public static void WriteUInt32(this UnmanagedMemoryStream stream, uint value)
        {
            Write<UInt32>(stream, value);
        }
        public static void WriteInt64(this UnmanagedMemoryStream stream, long value)
        {
            Write<Int64>(stream, value);
        }
        public static void WriteUInt64(this UnmanagedMemoryStream stream, ulong value)
        {
            Write<UInt64>(stream, value);
        }
        public static void WriteSingle(this UnmanagedMemoryStream stream, float value)
        {
            Write<Single>(stream, value);
        }
        public static void WriteDouble(this UnmanagedMemoryStream stream, double value)
        {
            Write<Double>(stream, value);
        }
        public static void WriteDecimal(this UnmanagedMemoryStream stream, decimal value)
        {
            Write<Decimal>(stream, value);
        }
    }
} 


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