[C#] Memory Class

/*
 * xMemory Class
 * by Shawak
*/

using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Runtime.InteropServices;

class xMemory
{

	// Global Variable
	public static IntPtr ProcessHandle = IntPtr.Zero;

	// Native Functions
	[DllImport("kernel32.dll", SetLastError = true)]
	private static extern IntPtr OpenProcess(int DesiredAccess, bool InheritHandle, int ProcessID);
	[DllImport("kernel32.dll", SetLastError = true)]
	private static extern bool CloseHandle(IntPtr Handle);
	[DllImport("kernel32.dll", SetLastError = true)]
	private static extern bool ReadProcessMemory(IntPtr ProcessHandle, IntPtr Address, ref byte[] Buffer, int Size, ref int NumberOfBytesRead);
	[DllImport("kernel32.dll", SetLastError = true)]
	private static extern bool WriteProcessMemory(IntPtr ProcessHandle, IntPtr Address, byte[] Buffer, int Size, ref int NumberOfBytesWritten);



	public static uint DELETE = 0x00010000;
	public static uint READ_CONTROL = 0x00020000;
	public static uint WRITE_DAC = 0x00040000;
	public static uint WRITE_OWNER = 0x00080000;
	public static uint SYNCHRONIZE = 0x00100000;
	public static uint END = 0xFFF; //if you have Windows XP or Windows Server 2003 you must change this to 0xFFFF
	public static uint PROCESS_ALL_ACCESS = (DELETE | READ_CONTROL | WRITE_DAC | WRITE_OWNER | SYNCHRONIZE | END);


	// API-Implentation
	static internal bool OpenProcess(int PID)
	{
		xMemory.ProcessHandle = xMemory.OpenProcess((int)PROCESS_ALL_ACCESS, false, PID); // 0x1f0fff
		return (xMemory.ProcessHandle == IntPtr.Zero ? false : true);
	}

	static internal bool CloseHandle()
	{
		if (xMemory.ProcessHandle == IntPtr.Zero)
			return false;
		return xMemory.CloseHandle(xMemory.ProcessHandle);
	}

	// Declarations
	[DllImport("KERNEL32", EntryPoint = "ReadProcessMemory", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
	private static extern bool ReadMemoryByte(IntPtr Handle, int Address, ref byte Value, int Size = 1);
	[DllImport("KERNEL32", EntryPoint = "ReadProcessMemory", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
	private static extern bool ReadMemoryShort(IntPtr Handle, int Address, ref short Value, int Size = 2);
	[DllImport("KERNEL32", EntryPoint = "ReadProcessMemory", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
	private static extern bool ReadMemoryInteger(IntPtr Handle, int Address, ref int Value, int Size = 4);
	[DllImport("KERNEL32", EntryPoint = "ReadProcessMemory", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
	private static extern bool ReadMemoryLong(IntPtr Handle, int Address, ref long Value, int Size = 8);
	[DllImport("KERNEL32", EntryPoint = "ReadProcessMemory", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
	private static extern bool ReadMemorySingle(IntPtr Handle, int Address, ref float Value, int Size = 4);
	[DllImport("KERNEL32", EntryPoint = "ReadProcessMemory", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
	private static extern bool ReadMemoryDouble(IntPtr Handle, int Address, ref double Value, int Size = 8);

	[DllImport("KERNEL32", EntryPoint = "WriteProcessMemory", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
	private static extern bool WriteMemoryByte(IntPtr Handle, int Address, ref byte Value, int Size = 1);
	[DllImport("KERNEL32", EntryPoint = "WriteProcessMemory", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
	private static extern bool WriteMemoryShort(IntPtr Handle, int Address, ref short Value, int Size = 2);
	[DllImport("KERNEL32", EntryPoint = "WriteProcessMemory", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
	private static extern bool WriteMemoryInteger(IntPtr Handle, int Address, ref int Value, int Size = 4);
	[DllImport("KERNEL32", EntryPoint = "WriteProcessMemory", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
	private static extern bool WriteMemoryLong(IntPtr Handle, int Address, ref long Value, int Size = 8);
	[DllImport("KERNEL32", EntryPoint = "WriteProcessMemory", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
	private static extern bool WriteMemorySingle(IntPtr Handle, int Address, ref float Value, int Size = 4);
	[DllImport("KERNEL32", EntryPoint = "WriteProcessMemory", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
	private static extern bool WriteMemoryDouble(IntPtr Handle, int Address, ref double Value, int Size = 8);

	// Read Functions
	public static byte ReadByte(int Address, int Size = 1)
	{
		byte value = 0;
		ReadMemoryByte(ProcessHandle, Address, ref value, Size);
		return value;
	}
	public static short ReadShort(int Address, int Size = 2)
	{
		short value = 0;
		ReadMemoryShort(ProcessHandle, Address, ref value, Size);
		return value;
	}
	public static int ReadInteger(int Address, int Size = 4)
	{
		int value = 0;
		ReadMemoryInteger(ProcessHandle, Address, ref value, Size);
		return value;
	}
	public static long ReadLong(int Address, int Size = 8)
	{
		long value = 0;
		ReadMemoryLong(ProcessHandle, Address, ref value, Size);
		return value;
	}
	public static float ReadSingle(int Address, int Size = 8)
	{
		float value = 0;
		ReadMemorySingle(ProcessHandle, Address, ref value, Size);
		return value;
	}
	public static double ReadDouble(int Address, int Size = 8)
	{
		double value = 0;
		ReadMemoryDouble(ProcessHandle, Address, ref value, Size);
		return value;
	}
	public static string ReadString(int Address)
	{
		byte[] b = new byte[] { 0 };
		string str = "";
		bool ret = false;
		do
		{
			ret = ReadMemoryByte(ProcessHandle, Address, ref b[0]);
			Address += 0x1;
			if (ret == true)
				if (b[0] != 0)
					str += System.Text.Encoding.UTF8.GetString(b);
		} while (b[0] != 0);
		return str;
	}

	// Write Functions
	public static bool WriteByte(int Address, byte Value, int Size = 1)
	{
		return WriteMemoryByte(ProcessHandle, Address, ref Value, Size);
	}
	public static bool WriteShort(int Address, short Value, int Size = 2)
	{
		return WriteMemoryShort(ProcessHandle, Address, ref Value, Size);
	}
	public static bool WriteInteger(int Address, int Value, int Size = 4)
	{
		return WriteMemoryInteger(ProcessHandle, Address, ref Value, Size);
	}
	public static bool WriteLong(int Address, long Value, int Size = 8)
	{
		return WriteMemoryLong(ProcessHandle, Address, ref Value, Size);
	}
	public static bool WriteSingle(int Address, float Value, int Size = 8)
	{
		return WriteMemorySingle(ProcessHandle, Address, ref Value, Size);
	}
	public static bool WriteDouble(int Address, double Value, int Size = 8)
	{
		return WriteMemoryDouble(ProcessHandle, Address, ref Value, Size);
	}

	// Protection
	[DllImport("kernel32", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
	private static extern bool VirtualProtectEx(IntPtr hProcess, IntPtr lpAddress, IntPtr dwSize, uint flNewProtect, ref uint lpflOldProtect);

	public object GetBytesLength(string str)
	{
		System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
		byte[] bytes = enc.GetBytes(str);
		return bytes.Length;
	}

	public static uint RemoveProtect(int Address, int BytesLength)
	{
		uint oldProtection = 0;
		VirtualProtectEx(ProcessHandle, new IntPtr(Address), new IntPtr(BytesLength), 0x40, ref oldProtection);
		return oldProtection;
	}

	public static bool AddProtect(int Address, int BytesLength, uint oldProtection)
	{
		VirtualProtectEx(ProcessHandle, new IntPtr(Address), new IntPtr(BytesLength), oldProtection, ref oldProtection);
		return true;
	}
}