резервное копирование

string connectionString1 = (@"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|Database1.mdf;Database=Database1;Integrated Security=True; User Instance=True");
            SqlConnection cn = new SqlConnection(connectionString1);
            cn.Open();
            SqlCommand cmd = new SqlCommand();
            SqlDataReader reader;
            cmd.CommandText = @"BACKUP DATABASE Database1 TO DISK = 'C:\SRI2Works.bak'";

            cmd.CommandType = CommandType.Text;
            cmd.Connection = cn;
            reader = cmd.ExecuteReader();
            cn.Close();
            MessageBox.Show("Database Backup Successfull.");

восстановить

string connectionString1 = (@"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|Database1.mdf;Database=Database1;Integrated Security=True; User Instance=True");
            SqlConnection cn = new SqlConnection(connectionString1);
            cn.Open();

            SqlCommand cmd = new SqlCommand();
            SqlDataReader reader;
            cmd.CommandText = @"use master; RESTORE DATABASE Database1 FROM DISK = 'C:\SRI2Works.bak'";
            cmd.CommandText = "DBCC CHECKDB ('Database1')";
            cmd.CommandType = CommandType.Text;
            cmd.Connection = cn;
            reader = cmd.ExecuteReader();
            cn.Close();
            MessageBox.Show("Database Restored Successfull.");

Этот код успешно работает, но нене вносить никаких изменений.