I'm using VS2010 (C#) for a WinForm database program. I've created a dataset, myds, which generates a couple of related files:
It is a known bug.
Unload the project containing your dataset.
Edit the project file (example 'datasetobjects.csproj') with text editor. If you have another datasets you can find rows as:
<None Include="My_DS.xsd"> <SubType>Designer</SubType> <Generator>MSDataSetGenerator</Generator> <LastGenOutput>My_DS.Designer.cs</LastGenOutput> </None>
And the problem is in the row
It may be misssing or incorrect for your DataSet.