C#

// Dont know if this is going to be accessed outside of the class
// If so you might want to make a wrapper property for it
private SqlDataAdapter da;
// Should contain your data
private DataSet ds;

..... somewhere in your initialization code .....
da = new SqlDataAdapter("SELECT * FROM Customer_2", [YourConnectionString]);
da.UpdateCommand = [your update command];
da.DeleteCommand = [your delete command];
da.InsertCommand = [your insert command];

// dont return anything here, just fill the dataset
public void GetCustomers()
{
         da.Fill(ds);
}

// Saves all the changes to the database
public void SaveChanges()
{
         da.Update(ds, "[your table name]");
         // Accept the changes in the dataset
         ds.AcceptChanges();
}