When I try to Deserialize Process Parameters to extract the BuildSettings, I have got the following error message:
“The type or namespace name ‘Workflow’ does not exist in the namespace ‘Microsoft.TeamFoundation.Build’ (are you missing an assembly reference?)”
But I have already added the dll to the project! (You can see the Dlls located at “C:\Program Files\Microsoft Visual Studio 10.0\Common7\IDE\PrivateAssemblies”)
After spending few minutes on the web I have found the solution from this post! The problem of this error is that, Visual Studio 2010 sets the .NET Framework Version to “.NET Framework 4 Client Profile” in default.
So the solution is to change the Target framework to .NET Framework 4
When you change the target framework, it will ask for the confirmation, just click Yes to continue..!
That’s all, we are done with this error!
Happy TFS programming..! Thanks R./
Refrences:
2.http://social.msdn.microsoft.com/Forums/en-US/tfsbuild/thread/b42b69a9-b4be-46e5-a064-dbe97c9a0ad9
Step Bi Step 
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#2 by Takashi Koyama on November 24, 2015 - 9:17 am
This did not work on our project. The .NET framework was already set to 4 and kept getting the same error. I was told that this project was built in VS 2010 and we are using 2012.
#3 by Rajanihanth on November 24, 2015 - 9:43 am
Hi Takashi, if it is VS 2012 and then choose .Net Framework 4.5 and try it again. Thx
#4 by Takashi Koyama on December 14, 2015 - 3:46 pm
Thank you for the reply. I changed it .Net FWK 4.5 but still the same. 😦