C#错误：使用未分配的局部变量

for (i = 0; i < hand.Length; i++)
{
   Console.WriteLine(hand[i]);
}

我试图存储值,以便以后显示它们.写作线可以帮助我确保代码实际上按照我的意图运行.

其余代码供参考：
*编辑：添加了一行代码

enum house //variable type for the card type
{
    Spades,Hearts,Clubs,Diamonds
}

enum cards //variable type for the cards
{
    Joker,Ace,Two,Three,Four,Five,Six,Seven,Eight,Nine,Ten,Jack,Queen,King
}

class Program
{
    static void Main(string[] args)
    {

        Random rnd;
        Random rnd2;

        int i;
        int random;
        int random2;

        String[] hand;

        house randomhouse;
        cards randomcard;

        //all declared variables

        Console.WriteLine("Your hand is made up of :");

        for (i = 0; i <= 6; i++)//does everything in the {} until i is equal to 6
        {

            rnd2 = new Random();
            random2 = rnd2.Next(0,14);
            randomcard = (cards)random2; //selecting a random card from joker to king

            if (randomcard > (int)cards.Joker) //if the random card isn't a joker
            {
                rnd = new Random();
                random = rnd.Next(0,4);
                randomhouse = (house)random;//selects a random card type

                Console.WriteLine(randomcard + " of " + randomhouse); //outputs the name of the card
                System.Threading.Thread.Sleep(1000);//wait 1 second before getting the new card
            }

            else
            {
                Console.WriteLine(randomcard);//outputs "Joker"
                System.Threading.Thread.Sleep(1000);//wait 1 second before getting the new card
            }

            hand = new String[i];//making a new array value for every loop
            hand[i] = randomcard.ToString();//adding randomcard to the array*

        } 

        Console.Clear();

        for (i = 0; i < hand.Length; i++)
        {
            Console.WriteLine(hand[i]);
        }

        Console.ReadKey();
    }
}