I am working on CI for my team,  new projects are using .net framework 4.5, our server 2008 also has framework4.5 installed, but My TFS2012 still got Error like this:
The application pool that you are trying to use has the 'managedRuntimeVersion' property set to 'v4.0'. This application requires 'v4.5'

There are two solutions I tried can fix this issue.
both need use a textpad edit the project file:
Add one of below before <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>:



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