In order to get to the code that is auto-generated by Visual Studio, follow these steps:
            1. In the menu, select View -> Solution Explorer
            2. In Solution Explorer, click the “Show all Files” icon at the top
            3. Expand the file (e.g. Dataset1.xsd) that you want the generated code for 
            4. Double click on the corresponding Designer file (e.g. Dataset1.Designer.vb) to open up the generated code

From there, you can read and edit the underlying code.

~ Yun Zhou