Need help converting int to string in C sharp?

[aztec warrior]

I'm writing a Blackjack program in C# and need help. I have a random value generator and have declared it twice as if it was two cards. Every time a 11 is generated i need it to output "jack" instead of "11". I'm having trouble doing this and this is what i have so far.

string jack="jack";
card1 = gen.Next(13) + 1;
card2 = gen.Next(13) + 1;

if (card1==11 || card2 ==11)
{
jack = card1.ToString();
jack = card2.ToString();

card1 = jack;
card2 = jack;
}

Console.WriteLine("Your two cards dealed are a "+card1+" and "+ card2);