In Visual Studio '15' preview Microsoft introduce that Work Items (Bugs, Tasks, ....) isn't opened in Visual Studio but Visual Studio opens it in default web browser. In "What's new list" Microsoft says that if user uses older version of TFS, Visual Studio opens Work Items by old way.
My question is that is there any way force Visual Studio to opens Work Items in VS from any version of TFS? I am using Visual Studio Online and can't choose TFS version.
In the preview you can set your preferred way of opening work items using the settings available at Tools -> Options -> Work Items.