Going back in time

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I had the need to migrate an Ajax project created in VS2008 consisting of several class libraries back into a larger project created and built with VS2005. I'm not ready to convert that project into VS2008 just yet.

I preferred to just convert the csproj files back to VS2005 format and add them to the existing VS2005 project. I discovered a few easy steps that can allow you to do this. Note: I had already converted (most) of the project files to use .NET 2.0. If you are using Ajax extensions you will have to make your web.config align with this as well. Do this first in VS2008. Obviously if you are using any .NET 3.0 or .NET 3.5 features, this isn't going to work for you...

Next open the csproj file you want to change in Notepad.

Near the top is the Project node. If this contains ToolsVersion="3.5" remove this attribute: