Question

I have a DataSet.xsd file in a class library project. When I double click on the file instead of seeing the table diagram I am presented with XML. Does anyone know what’s going on, and how I can get my Table Diagram back?

Answer 1

This was a multi-part solution that had several cascading symptoms. I don’t really understand the cause of the problem which is concerning, but this at least put me back to coding.

Primary Problem:

Step 1:
Tried devenv /resetsettings in the VS Command Prompt per the ASP.NET Forum link and it FAILED.

Step 2: Tried devenv /resetskippkgs in the VS Command Prompt per the ASP.NET Forum link and it PASSED.

Issue:

Right clicking on a table adapter and selecting configure would result in this error message:

Configure TableAdapter XXX Failed. Unable to find connection ‘xxx’ for
object ‘settings’. The connection string could not be found in
application settings, or the data provider associated with the
connection string could not be loaded.

Step 1: Looked in all of my .xsd files for multiple definitions of a connection string. In my case there were none acrossed several files. MSDN Forum FAILED

Step 2: Tried deleting the connection string setting and rebuilding it from scratch in the settings.settings pane. FAILED

Step 3: Changed all of my DefaultConnectionindex’s in the .xsd files to 1. Interesting how conflicted the answers inside MSDN Forum are. Some said 0, some said 1. I am not confident my fix had anything to do with me ultimately. Visual Studio appeared to create the bug somehow, and just the same appeared to take care of it. PASSED

Issue

After re-configuring my Table Adapter I was given the following error when trying to save changes:

Attempted to read or write protected memory. This is often an
indication that other memory is corrupt.

Step 1: Restarted my machine and made the changes to the table adapter again and the changes were saved. PASSED