Пример использования Provider Factory
DbDataReader rdr;
DbProviderFactory provider =
DbProviderFactories.GetFactory("System.Data.SqlClient");
  using (DbConnection cn = provider.CreateConnection())
  {
    using (DbCommand cmd = provider.CreateCommand())
    {
      cmd.CommandText = "SELECT * FROM Sales.Customer";
      cmd.Connection = cn;
      cn.ConnectionString =
      ("SERVER= sql2005;INTEGRATED SECURITY=True;"
      + "DATABASE=AdventureWorks");
      cn.Open();
      rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
      DataTable dt = new DataTable("Product Locations");
      dt.Load(rdr);
      dataGridView1.DataSource = dt;
    }
  }
}

Поделитесь материалом с коллегами и друзьями