Problem
In Visual Studio 2010, the rocket-SVN client work best. However, it’s not supported in Visual Studio 2012 and there are no plan from the developer that the Rocket SVN will be updated to support Visual Studio 2012.
Solution
The solution is to switch the SVN solution to Tortoise SVN. After you installing the tortoise you should do some upgrade or create new working copy. This video tell you how to
Adding a new local copy from your SVN server
Upgrading your current local SVN server to work with new Tortoise
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