Question

I need to write a comparer for a core class in C#. I have a SortedSet<Vector2> and in order to iterate through it I need a basic comparer. Nothing fancy needed as I just need to access each element in the collection in any order. But Vector2 (Microsoft.Xna.Framework.Graphics) is a compiled dll without a default comparer.

My SortedSet has a property Comparer but I cannot figure how to assign Comparer a Vector2 comparer.

Answer 1

You need to create your own class which implements IComparer<Vector2> and then constructor your SortedSet with it:

SortedSet<Vector2> sorted = new SortedSet<Vector2>(new MyCustomComparer());

Your comparer just needs to implement the single method Compare:

public class MyCustomComparer : IComparer<Vector2>
{
    public int Compare(Vector2 x, Vector2 y)
    {
        // Return appropriate value here, depending on the sort order you want
    }
}