Call the DataBind() method to bind the data to the GridView. Example: SqlDataAdapter adapter = new SqlDataAdapter("SELECT * FROM Customers", connection); DataTable dt = new DataTable();

Short answer: dapter.Fill(dt); GridView1.DataSource = dt; GridView1.DataBind(); dapter.Fill(dt); GridView1.DataSource = dt; GridView1.DataBind(); dapter.Fill(dt); GridView1.DataSource = dt; GridView1.DataBind(); dapter.Fill(dt); GridView1.DataSource = dt; GridView1.DataBind();

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.