using System;
using System.Data;
using System.Data.Common;
using System.Data.SqlClient;
namespace file
{
class Friends
{
static void Main(string[] args)
{
try
{
DbConnection connection_f = new SqlConnection();
DbCommand command_f = new SqlCommand();
connection_f.ConnectionString = "Data Source= GENGRAN\\SQLEXPRESS;Initial Catalog = Friends;Integrated Security=True";
&