Use the DataAdapter's Update() method to push the changes back to the database. Example: SqlDataAdapter adapter = new SqlDataAdapter("SELECT * FROM Customers", connection); SqlCommandBuilder commandBuilder = new SqlCommandBuilder(adapter); // Automatically generates insert, update, delete commands DataSet dataset = new DataSet();

Short answer: dapter.Fill(dataset, "Customers"); // Modify data in the DataSet dataset.Tables["Customers"].Rows[0]["CustomerName"] = "New Name"; // Update the database with the modified data dapter.Update(dataset, "Customers"); dapter.Fill(dataset, "Customers"); // Modify data in the DataSet dataset.Tables["Customers"].Rows[0]["CustomerName"] =… "New Name"; // Update… the… database with the modified data dapter.Update(dataset,…

Explain a bit more

"Customers"); dapter.Fill(dataset, "Customers"); // Modify data in the DataSet dataset.Tables["Customers"].Rows[0]["CustomerName"] = "New Name"; // Update the database with the modified data dapter.Update(dataset, "Customers"); dapter.Fill(dataset, "Customers"); // Modify data in the DataSet dataset.Tables["Customers"].Rows[0]["CustomerName"] =… "New Name"; // Update the database with the modified data dapter.Update(dataset, "Customers");

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.