When you ask a question, make sure you include as much detail as possible. Such as code, the issue you are facing, and what you expect the result to be. Upload code here https://paste.mod.gg/(see $code for more information on how to paste your code)
What .NET version are you using? What do you mean by "open form"? Are you aware that a console app is... a console app, and thus can't open forms without a lot of fuckery that essentially means your app is now windows only?