IsSingleInstance Custom - AdarshRise/HandyControl GitHub Wiki

Run only one version of the program at a time

write the following code in the App.cs file

InstanceHelper.IsSingleInstance();

The above method returns true or false, However, it does everything automatically (closing app, focusing running app, showing message) You can also change the message text or not display the message

InstanceHelper.IsSingleInstance(false, "bye!");