Closing the connection with the Close() method to release resources.?

Short answer: Example: using (SqlConnection connection = new SqlConnection(connectionString)) { connection.Open(); // Execute commands here connection.Close(); }

Example code

Example: using (SqlConnection connection = new SqlConnection(connectionString)) { connection.Open(); // Execute commands here connection.Close(); }

Real-world example (ShopNest)

ShopNest opens a SqlConnection only for the query, then disposes it (using). Connection pooling reuses physical connections automatically.

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.