1-) C# RMOS - Programın açık olup olmadığını sorgulama How to check if application is running duplicate

if (Process.GetProcessesByName("RmosDocx").Length < 1)

            {

                MessageBox.Show("KAPALI");

            }

kaynak : https://stackoverflow.com/questions/18015193/how-to-check-if-application-is-running