Random words from array for Hangman

Ok, what exactly am I doing wrong here. I've tried a different things to return a random word from the array words but keep getting errors. The syntax appears to be similar to what I've read up on. Thanks.

    string GetRandomWords()
    {
        WordBook[] words = new WordBook[26];
        Random = new Random();

        return words[Random.Next(0, words.Length)];