Monoids in C# as I see them

MonoidsInCSharp.cs

public class Monoid<T> {
    public T None { get; private set; }
    public Func<T, T, T> Operation { get; private set; }

    public Monoid(Func<T,T,T> operation, T none) {
        this.Operation = operation;
        this.None = none;
    }
}