How to find the Field names in TESTSET?

Hi , 


How to retrieve Testset field names from ALM by using C#?


I tried like this which is not working..   string a66 = Convert.ToString(test["TC_EXECUTION_TIME"]);


its showing the error :  Invalid field name < TC_EXECUTION_TIME >.


can any one plz help me to find the field names here.


Thank you.

Praveen Ji