public List<int> getActualTaskOrder() {
            List<int> ris = new List<int>();
            int i=1;
            while(i<this.dataGridView1.Columns.Count){
                DataGridViewColumn c= this.dataGridView1.Columns[i];

                if (c.Name != "**")
                {
                    Console.WriteLine(c.HeaderText);

                    ris.Insert(c.Index-1, System.Convert.ToInt32(c.Tag));
                }
                i++;
            }
            return ris;
        }

var qry = from DataGridViewColumn col in grid.Columns
                  where col.Name != "**"
                  orderby col.DisplayIndex
                  select col.HeaderText;
        foreach (string txt in qry) {
            Console.WriteLine(txt);
        }