C# DropOutStack

DropOutStack.cs

public class DropOutStack<T> : LinkedList<T>
{
    private readonly int _capacity;

    public DropOutStack(int capacity)
    {
        _capacity = capacity;
    }

    public void Push(T item)
    {
        if (this.Count() >= _capacity)
        {
            RemoveLast();
        }

        AddFirst(item);
    }

    public T Pop()
    {
        if (!this.Any())
        {
            throw new InvalidOperationException("Stack empty.");
        }

        var item = First;
        RemoveFirst();

        return item.Value;
    }
}