If the aplication is inactive 2 or 3 minutes it must automatically logout.(may be using timer control)

Hi thanks for all of your help, system idle process dint work with wpf, I used threading and dispatcher timer to solve this.

There is no need for another process.

First, it is extrmely easy to determine when a .Net application becomes idle; the Application.Idle Event is fired when the application is idle. The documentation however is not clear whether it is for the thread or the process. Assuming you are not creating threads explicitly, that should not matter for you. The documentation also says that the Application.Idle Event must be detached when application is disposed, but I assume that is not necessary if you exit the process.
 
The problem is how to detect leaving idle. You can do that using a message filter, and if any keyboard message or any of the relevant mouse messages is processed, then the timer is stopped. The timer gets started again when the application idles again.
 
So that is the general concept. I have attached a sample. Note that all the relevant codes is in the Program.cs file.
 

Hi,

  You can do couple of things for this. I will tell you the concept . Since you want to monitor the state of the application you need have a secondary app which will monitor and trigger logout process. All the applications have a Process which in-turn  has atleast has one Thread which is a MainThread. Now Process and Thread has states(Suspended,Start,Running) So you can monitor based on Process and Thread.

Process:
 
     If you are going by process monitoring ,you have to create a secondary process and make that to monitor this process.
Below is the link for Multiprocess architecture in C#
http://www.codeproject.com/KB/DLL/MultiProcess.aspx

Thread:

  Since your application is in Wpf you can employee this MultiThreading and make the child thread(Backgroundworker is a managed Thread that it will reduce your coding difficulties.) check for MainThread(UI Thread) State and do the logout process.


So I would suggest to go for MultiThreading which will be very easy to work with.


Regards,
raaj