无法在Visual Studio中添加引用

Question

I have a project in VS 2017 all was working well until I update Mysql connector and hence mysql.data reference.

As you can see in the picture, when I open the reference dialog box, only come up the new version of the referenceand when i try to select it and save, an error arises:

The error says: "Already exists a reference to 'MySql.Data' in the project"

The question is: How can I remove the older reference? It's not shown in the dialogbox and do not know where to find it.

Any help;

Answer 1

You could take a look at the Solution Explorer of your project:

And remove the reference by pressing delete or right click and Remove. You can open the Solution Explorer by View -> Solution Explorer:

Or pressing Ctrl + W, S

Answer 2

Weird! I use VS 2010 and was able to add reference more than once without this error popping up.

The References can be found in project structure in "Solution Explorer" . Just remove the old reference and add new. If you are unable to find the Solution explorer you can go to "view" tab and activate it.