'Field' property of Test object is not displayed in interop.tdapiolelib.dll

Hi guys,

I have started my first QC OTA using C#.Net project and I am stuck with this question.

The below lines worked fine when I wrote them in VB Editor of Excel,

strTestCaseDescription = objTest.Field("TS_DESCRIPTION")

or

strTestCaseName = objTestFactory.Item(1).Field("TS_NAME)

but visual studio is saying Field property is not suported for a test object. Also when I see Test object properties in object browser, I dont see a property called Field in it. Please assist. 

I am able to fetch all design steps of test case but not able to fecth test case's description (details section in UI).