If you want to prevent a user from running multiple instances of your application on the same computer, you can do so by using a Mutex as shown in the example below.
[STAThread]
static void Main()
{
bool bMutexAcquired = false;
using (Mutex mutex = new Mutex(true, "Unique_Mutex_Name", out bMutexAcquired))
{
// If the mutex was not acquired, we should not run the app.
if (bMutexAcquired == false)
{
return 0;
}
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
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