How can I prevent launching my app multiple times?

Question

I deployed my C# WinForms application using ClickOnce installation. Everything works fine with it (after a lot of work) :), but now I\'m facing a problem:

Whenever

Answer 1

 if (Process.GetProcesses().Count(p => p.ProcessName == "exe name") > 1)
    {
        foreach (var process in 
 Process.GetProcessesByName("exe name"))
        {
            process.Kill();
        }
    }