/// <summary>
/// Determines whether the specified mouse button is down.
/// </summary>
/// <param name="action"></param>
/// <param name="button">The button.</param>
/// <param name="region"></param>
/// <returns>
/// <c>true</c> if the specified mouse button is down; otherwise, <c>false</c>.
/// </returns>
public static bool IsDown(this IInputContext action, MouseButtons button, Rectangle region)
{
var state = action.Current.MouseState;
return(action.IsDown(button) && region.Contains(state.X, state.Y));
}