Give values to cards in C# blackjack app

public enum Suit
{
    Hearts,
    Spades,
    Diamonds,
    Clubs
}

public enum Rank
{
    Ace = 1,
    //etc
    Ten,
    Jack,
    Queen,
    King
}

public class Card
{
    public Card(Suit suit, Rank rank)
    {
        Suit = suit;
        Rank = rank;
    }

    public Suit Suit
    {
        get;
        private set;
    }

    public Rank Rank
    {
        get;
        private set;
    }

    private bool IsPictureCard
    {
        get
        {
            return Rank >= Rank.Jack && Rank <= Rank.King;
        }
    }

    public int Value
    {
        get
        {
            if (IsPictureCard)
            {
                return 10;
            }
            else
            {
                return (int)Rank;
            }
        }
    }
}