3d model in c#

Hi, guys, I am a beginner of 3D model, I mean I don't know how to draw it. Now I need to start a project with 3d model, I want to ask what kind of 3d model file type does c# support and what kind of tools I can use to build up this 3d model?

I know there is no stupid question, just stupid people, lol

Please answer my question

Many thx