public void GetDataColumns(PgSqlConnection pgConnection)
{
  
  pgConnection.Open();
  PgSqlLoader loader = new PgSqlLoader();
  loader.Connection = pgConnection;
  loader.TableName = "load_table";
  PgSqlLoaderColumn myColumn;
  try
  {
    loader.CreateColumns();
    for (int i = 0; i < loader.Columns.Count; i++)
    {
      myColumn = loader.Columns[i];
      Console.WriteLine(myColumn.Name);
      Console.WriteLine(myColumn.PgSqlType.ToString());
      Console.WriteLine(myColumn.Size);
      Console.WriteLine(myColumn.Scale);
      Console.WriteLine(myColumn.Precision);
      Console.WriteLine();
    }
   }
  finally
  {
    pgConnection.Close();
  }
}