I was trying out Microsoft Visual C# codenam "Orcas" Express Edition the other day. When trying to create a WPF Application I got this error:
The project file 'C:\Documents and Settings\(Username)\Local Settings\Temp\vay1mynp.olr\Temp\(Application name).csproj' cannot be opened.
After searching around on the net for some minutes, I found a workaround. I had to go to this directory C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE and run this command
regsvr32.exe ProjectAggregator.dll from the command prompt.
After doing this, the WPF Application template worked.
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