Question

I have the following query:

    public class CheckItems
    {
        public String Description { get; set; }
        public String ActualDate { get; set; }
        public String TargetDate { get; set; }
        public String Value { get; set; }
    }



   List<CheckItems>  vendlist = new List<CheckItems>();

   var vnlist = (from up in spcall
               where up.Caption == "Contacted"
                      select new CheckItems
                      {
                          Description = up.Caption,
                          TargetDate = string.Format("{0:MM/dd/yyyy}", up.TargetDate),
                          ActualDate = string.Format("{0:MM/dd/yyyy}", up.ActualDate),
                          Value = up.Value
                      }).ToList();

// Next, when I try to add vnlist to vendlist, I get an error as I cannot add this to the list I get and error saying I have some invalid arguments

         vendlist.Add(vnlist);

Answer 1

If you need to add any IEnumerable collection of elements to the list you need to use AddRange.

vendlist.AddRange(vnlist);