Finding all test cases from TFS 2010 for a MTM test plan using C#

Question

Hi,

I have are requirement That i need to show all the test case for a plan with their test results. 

I used 

 string consult = "select * from TestResult where TestPlanId = " + testPlanID;
               // ITestCaseCollection tcc = tmtp.TestCases.Query();
                ITestCaseResultCollection tcrcol = tmtp.TestResults.Query(consult);

this gave me all the test cases details for the test cases which were run atleast once.

but I also need the list of test cases for the same plan which were not run even once. can some one help me with the same