c# Trying to reverse a list

Question

I have the following code:

public class CategoryNavItem {     public int ID { get; set; }     public string Name { get; set; }     public string Icon { get; set; }      public CategoryNavItem(int CatID, string CatName, string CatIcon)     {         ID = CatID;         Name = CatName;         Icon = CatIcon;     } }  public static List<Lite.CategoryNavItem> getMenuNav(int CatID) {     List<Lite.CategoryNavItem> NavItems = new List<Lite.CategoryNavItem>();      -- Snipped code --      return NavItems.Reverse(); } 

But I get the following error:

Cannot implicitly convert type 'void' to 'System.Collections.Generic.List<Lite.CategoryNavItem>'

Any ideas why this might be?

Answer 1

Try:

NavItems.Reverse(); return NavItems; 

List<T>.Reverse() is an in-place reverse; it doesn't return a new list.

This does contrast to LINQ, where Reverse() returns the reversed sequence, but when there is a suitable non-extension method it is always selected in preference to an extension method. Plus, in the LINQ case it would have to be:

return someSequence.Reverse().ToList();