 dt0.Field<string>("MethodName") equals dt0.Field<string>("MethodName")                               select new { dt0, dt0 };          DataTable finaldt = new DataTable("FinalTable");         finaldt.Columns.Add(new DataColumn("sp", typeof(string)));         finaldt.Columns.Add(new DataColumn("Method", typeof(string)));         finaldt.Columns.Add(new DataColumn("Class", typeof(string)));         finaldt.Columns.Add(new DataColumn("BLLMethod",