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When your solution is loaded you can login to teamcity by accessing the Teamcity menu inside visual studio.
Next you can choose to run a personal build
you select the project(s) in your solution you want to build. In the righthand screen you select the type of build/test you want to perform on the buildserver. In the lowerrighthandcorner of the screen you can check if you want to commit your sources if the test/build is successfull.
Happy coding
Onno