using Npgsql;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Management;

namespace DatenDB
{
  static class DatenbankConnection
  {
		private static NpgsqlConnection connection = null;
		
		public static NpgsqlConnection GetConnection()
		{
      if (connection?.State == System.Data.ConnectionState.Open) return connection;
      connection?.Dispose();
      connection = new NpgsqlConnection(ConfigurationManager.AppSettings["ConnectionString"]);

      return connection;
		}

	}
}