Is there a ready-to-use method to get a (TFS) Test filter criteria translation to c# language?

I'm developing an application that shows the percentages of past night release tests (using the API exposed by TFS). I need to "translate" the test filter criteria field into C# language to perform the calculation in order to obtain the percentages previously mentioned. For example, if I have a Test Category filter of this type TestCategory = UI & TestCategory! = Excluded I would like to get TestCategoryAttribute.Contains ("UI") &&! TestCategoryAttribute.Contains ("Excluded"). Does anyone know if there is a ready-to-use method to achieve this type of operation? Thank you.