insert to database in c#

SqlConnection connection = new SqlConnection();
           connection.ConnectionString = "Data Source=ASA-PC\\SQLEXPRESS; Initial Catalog=Material_database; User ID=sa;Password=sa;Integrated Security=false;Connect Timeout=10";
           connection.Open();

           {
               SqlCommand CmdSql = new SqlCommand("INSERT INTO [mat_utiAndtrans](Project, Date, Team_Leader, Vendor, WO, Rate,Code,Qty,Officer,Remark) VALUES (@Project, @Date, @Team_Leader, @Vendor, @WO, @Rate,@Code,@Qty,@Officer,@Remark)", connection);
               connection.Open();
               CmdSql.Parameters.AddWithValue("@Project", txtproject.Text);
               CmdSql.Parameters.AddWithValue("@Date", txtdte.Text);
               CmdSql.Parameters.AddWithValue("@Team_Leader", txtTeamleader.Text);
               CmdSql.Parameters.AddWithValue("@Vendor", txtvendor.Text);
               CmdSql.Parameters.AddWithValue("@WO", txtwo.Text);
               CmdSql.Parameters.AddWithValue("@Rate", txtrate.Text);
               CmdSql.ExecuteNonQuery();
               connection.Close();