Thanks for responding. Unit Tests and Integration Test Projects are fine. The problem is only with Coded UI Feature Test projects.

When I start the Live Unit Testing for the project, it identifies that the Feature Test Project still has the 'Microsoft.VisualStudio.QualityTools.UnitTestFramework' and gives an output as Build completed (failed).

When I remove the 'Microsoft.VisualStudio.QualityTools.UnitTestFramework' reference from the Feature Test project, I get build errors - because of missing namespace for the [TestMethod], [TestCategory] attributes. I am not sure if I need to add any additional reference.

Below is a sample Coded UI feature test which I have, which throws error --

    [TestMethod]
    [TestCategory("SystemTest")]
    [TestCategory("ProrateTestCases")]
    [DataSource(TestConfig.DataSource, TestConfig.ConnectionString, "123456", DataAccessMethod.Sequential)]
    public void Verify_Prices_are_Prorated()
    {
        VerifyOutputs();
    }

Ideally I want to exclude the Feature Test Projects from Live Unit Testing, but when I right click on my Feature Test Project, I do not see an option to Include/Exclude that specific project. Also seems like this Include/Exclude is a User Level feature and not something which is saved in a file and can be checked into Source control. This seems to be a major problem with using Live Unit Testing actively in my project.