title: c# cant add references
body: <p>Good afternoon . I'm doing a project for school with C # , database and mysql. When I try to add the extension mysql.data it is simply not added. I have installed mysql connector , I have seen hundreds of tutorials but when I add the extension as a reference it is marked but is not added . just go back to go add - reference - extensions and we can see it is not checked again. someone can help me please?</p>