How to delete my windows application app.exe in program files on uninstalling in c#...

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C#

C#4.0

How to delete my windows application app.exe in program files on uninstalling in c#....On uninstalling my exe its not getting removed from program files...I gave the administrative rts as follows for my app.exe...Also under which event i should write the code to do so...

ProcessStartInfo proc = new ProcessStartInfo();
proc.UseShellExecute = true;
proc.FileName = Application.ExecutablePath;
proc.Verb = "runas";



try
            {

                Process.Start(proc);

            }

            catch

            {

                // The user refused the elevation.

                // Do nothing and return directly ...

                return;

            }

            Application.Exit();  // Q

and also added app.manifest with requireadministrator option...Still its not going from program files on uninstalling...