How do you handle stored procedure parameters in ADO.NET?

Short answer: Stored procedure parameters are handled by adding SqlParameter objects to the SqlCommand's Parameters collection. You set the parameter name, data type, and value.

Example code

SqlCommand command = new SqlCommand("GetCustomerDetails", connection); command.CommandType = CommandType.StoredProcedure; command.Parameters.AddWithValue("@CustomerID", customerId);

Real-world example (ShopNest)

Always pass order ids with parameters: cmd.Parameters.AddWithValue("@id", orderId). Never concatenate user input into SQL.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.