Call Customized GPT with API from .Net app

I need to create a simple interface in Visual Studio for send request to my customized GPT and show the result as well.
I’m newest and I don’t know how proceed quickly.

thank you in advance

Hi and welcome to the Developer Forum!

I can be wrong but I don’t think it’s possible to request custom GPTs through an API .
I would recommend you to take a look at this How to make an API call to a custom GPT model? they seem to have a workaround using Assistants API.