Restrict to open Windows Forms Application another time C#.NET

Steps:

• Open Program.cs page from your solution.
• And use any method whatever you want.

Method 1:
String thisprocessname = Process.GetCurrentProcess().ProcessName;
string appName = thisprocessnambe;
bool createdNew;
mutex = new Mutex(true, appName, out createdNew);
if (!createdNew)
{
   MessageBox.Show("Application is already Running");
    //app is already running! Exiting the application
   return;
}

Method 2:

if (Process.GetProcesses().Count(p => p.ProcessName == thisprocessname) > 1)
            {
                MessageBox.Show("Application is already running");
                return;
            }
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            Application.Run(new Home());