Hi @Not R1oT ,
Welcome to Microsoft Q&A forum.
I agree with @David Lowndes , and I believe you are developing a console application. The console application is different from other kind of projects, it cannot be started directly by double-clicking it(otherwise it will open and run and then close automatically and immediately). If you want to run it and keep it displaying, you can open a Command Prompt like CMD and call to run it. See following screenshot:

Or just running it in the Visual Studio.
Best Regards,
Tianyu
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