Quick and dirty way to turn off numlock. One of my laptops doesn't have a numlock key but apparently still has logic to use the right side of the keyboard as a number pad so whenever it was disconnected from dock while numlock was still on could be annoying.

TurnOffNumlock.cs

void Main()
{
	if (Console.NumberLock)
	{
		NativeMethods.SimulateKeyPress(NativeMethods.VK_NUMLOCK);
	}
}

public static class NativeMethods
{
	public const byte VK_NUMLOCK = 0x90;
	public const uint KEYEVENTF_EXTENDEDKEY = 1;
	public const int KEYEVENTF_KEYUP = 0x2;

	[DllImport("user32.dll")]
	public static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, int dwExtraInfo);

	public static void SimulateKeyPress(byte keyCode)
	{
		keybd_event(VK_NUMLOCK, 0x45, KEYEVENTF_EXTENDEDKEY, 0);
		keybd_event(VK_NUMLOCK, 0x45, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
	}
}