Group by With LinQ

Here is Simple Code for understanding Group By in LinQ. // Group by With Linq List ls = new List(); using (LinqModel.LinqEntities ST1 = new LinqModel.LinqEntities()) { var V = (from State in ST1.State_Master group State by State.CountryID into temp select new { T1 = temp.Key.Value, T2 = temp }).ToList(); foreach (var c in V) { for (int i = 0; i < c.T2.ToList().Count; i++) { ls.Add(c.T2.ToList()[i].StateName); } } }; // Group by With Linq using Lambada expression // Same Result as above using (LinqModel.LinqEntities ST1 = new LinqModel.LinqEntities()) { var vLambada = ST.State_Master.GroupBy(state => state.CountryID).ToList(); foreach (var state in vLambada) { for (int i = 0; i < state.Count(); i++) { ls.Add(state.ToList()[i].StateName); } } }; Rpt.DataSource = ls; Rpt.DataBind();