/// <summary>
/// Determines whether the user is idle if the last user input was more than 10 minutes ago.
/// </summary>
/// <returns><c>True</c> if the user is idle, else <c>false</c>.</returns>
private bool IsUserIdle()
{
var ticks = Environment.TickCount;
var idleTime = ticks - NativeMethodsHelper.GetLastInputInfoTickCount();
idleTime = ((idleTime > 0) ? (idleTime / 1000) : 0);
return(idleTime > 600); // idle for 10 minutes
}