using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections.Generic;
using System.Text;
class Program
{
static void Main(string[] args)
{
SqlConnection thisConnection = new SqlConnection(
@"Data Source=.\SQLEXPRESS;" +
@"AttachDbFilename='NORTHWND.MDF';" +
@"Integrated Security=True;Connect Timeout=30;User Instance=true");
SqlDataAdapter thisAdapter = new SqlDataAdapter("SELECT CustomerID, CompanyName FROM Customers", thisConnection);
SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter);
DataSet thisDataSet = new DataSet();
thisAdapter.Fill(thisDataSet, "Customers");
Console.WriteLine("# rows before change: {0}",thisDataSet.Tables["Customers"].Rows.Count);
DataColumn[] keys = new DataColumn[1];
keys[0] = thisDataSet.Tables["Customers"].Columns["CustomerID"];
thisDataSet.Tables["Customers"].PrimaryKey = keys;
DataRow findRow = thisDataSet.Tables["Customers"].Rows.Find("1");
findRow.Delete();
int rowsAffected = thisAdapter.Update(thisDataSet, "Customers");
Console.WriteLine("Deleted {0} rows.", rowsAffected);
Console.WriteLine(thisDataSet.Tables["Customers"].Rows.Count);
thisConnection.Close();
}
}