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