PP/Transportation/dbhelper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;

namespace Transportation
{
    class dbhelper
    {
        public static SqlConnection sqlConnection = null;
        public static void openConnection(ref SqlConnection a)
        {
            a = new SqlConnection("Data Source=ngknn.ru;Initial Catalog=Sergeichev_PP;Persist Security Info=True;User ID=31П;Password=12357");
            a.Open();
        }
    }
}