Reverse Sorted Dictionary in .NET

Question

Is there any way I can iterate backwards (in reverse) through a SortedDictionary in c#?

Or is there a way to define the SortedDictionary in descending order to begin

Answer 1

Briefly create a reversed sorted dictionary in one line.

var dict = new SortedDictionary(Comparer.Create((x, y) => y.CompareTo(x)));

There's a way to create a IComparer using System.Collections.Generic.Comparer. Just pass a IComparision delegate to its Create method to build a IComparer.

var dict = new SortedDictionary(
    Comparer.Create(
        delegate(int x, int y)
        {
            return y.CompareTo(x);
        }
    )
);

You can use a lambda expression/local function/method to replace the delegate if their significance are (TKey, TKey) => int.