public static int CheckNextPreviousKeys(this KeyboardState keyboard, Keys next, Keys previous, TimeSpan repeatTime, GameTime gameTime, ref TimeSpan lastNext, ref TimeSpan lastPrevious)
{
int value = 0;
if (keyboard.CheckRepeat(next, gameTime, ref lastNext, repeatTime))
{
value++;
}
if (keyboard.CheckRepeat(previous, gameTime, ref lastPrevious, repeatTime))
{
value--;
}
return(value);
}