How to convert var in List?

Question

I need to convert a var in the type List<myStruct>. I had to use var to order a list of myStruct and I got orderedList2, but now I need to iterate this list and I don't know how to do it.

public struct myStruct
{

    public String delivery;
    public String articleCode;
    public String dex;
    public String phase;
    public String quantity;

};

List<myStruct> myList;

var orderedList2 = myList.OrderByDescending(x =>
    {
        DateTime dt;
        DateTime.TryParse(x.delivery, out dt);
        return x;
    });

// now I have to fill the ListView again
foreach(myStruct str in orderedList2)
{
    string[] s = new string[5];
    s[0] = str.delivery;
    s[1] = str.articleCode;
    s[2] = str.dex;
    s[3] = str.phase;
    s[4] = str.quantity;

    ListViewItem itl = new ListViewItem(s);
    ////String s = r["DEXART"].ToString();
    ////MessageBox.Show(s);
    listView1.Items.Add(itl);
}

When the code hits the foreach statement I get an exception.

Answer 1

Either implement IComparable on your struct or you have a mistake in your order lambda:

 var orderedList2 = myList.OrderByDescending(x =>
    {
        DateTime dt;
       if( DateTime.TryParse(x.delivery, out dt))
           return dt;
        return DateTime.MinValue;
    });

you can follow it with .ToList() cal to get List<myStruct> orderedList2.

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it works: