Usage of Mutex in c#

Question

I am a bit new in threading in c# and on general, in my program I am using mutex to allow only 1 thread getting inside a critical section and f

Answer 1

Mutex use to identify run app instance.

 using (Mutex mutex = new Mutex(true, "app name", out createdNew))
            {
                if (createdNew)//check app is already run
                {
                    KillOthers();
                    StartApp();
                }
                else
                {
                    MessageBox.Show("Another instance already running!");
                }
            }