I am writing this code. Here dt is input into the function, as well as someint. The column Exp is a T-SQL date column, which comes as a DateTime through Linq.
If you are using the Entity Framework, use the System.Data.Objects.EntityFunctions as below:
c.CMT_TS > System.Data.Objects.EntityFunctions.AddDays(e.Call.CALL_TS, 1)