ZylIdleTimer.NET is a .NET component which helps you to take actions after a specified system-wide (related to the whole system) idle time or to check the time interval of user inactivity. System Idle time is the time interval of full user inactivity. In this interval any user action is missing on the computer, like pressing a key of the keyboard or moving the mouse or pressing a mouse button or rotating the scroll. ZylIdleTimer.NET is written 100% in C# using .Net framework and API calls. The demo version is fully functional. The package includes demo programs to show how ZylIdleTimer.NET works and a help file with the description of the component.