Stored procedure C#

Question

I am using a stored procedure to insert a record into a table. i am passing an output paramater to get the identity value of the row inserted. The stored procedure is working fine and i am able to see the out put value. BUT WHEN I AM USING C# CODE FOR RETRIEVING THE VALUE, THE VALUE IS OF THE OUTPUT PARAMETER IS BEING SET TO DBNULL.VALUE. could you please help me out. omkar