c# - Trackablecollection problem in EF -

I'm newbie in EF

I have added table A to Table B, from primary table A to ID on the table, there is a secondary ID that is trying to retrieve an object in Table B. But I trackableCollection'1 [Object name (from table B)]

Getting a suggestion? The code I am trying to retrieve using the stored proc here is:

Select the external participant Table A as the table B. with the da id = CRID where da ID = @d