Using lambda expression in place of IComparer argument

Question

Is it possible with C# to pass a lambda expression as an IComparer argument in a method call?

eg something like

var x = someIEnumerable.OrderBy(aClas         


        

Answer 1

As Jeppe points out, if you're on .NET 4.5, you can use the static method Comparer.Create.

If not, this is an implementation that should be equivalent:

public class FunctionalComparer : IComparer
{
    private Func comparer;
    public FunctionalComparer(Func comparer)
    {
        this.comparer = comparer;
    }
    public static IComparer Create(Func comparer)
    {
        return new FunctionalComparer(comparer);
    }
    public int Compare(T x, T y)
    {
        return comparer(x, y);
    }
}