>>I guess I need to add another reference to my project as StringReader is not understood.
>
>Ok, I put System.IO. in front of the StringReader and it can now find the reference. However, I've seen in several examples that nobody is putting it in front. I guess it is part of the Inherits syntax at the top of the class. I tried putting it at that level but I didn't succeed to find the proper syntax.

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Try this --

Imports System.IO