Form1的类型初始值设定项引发异常

所以我对C#编码有些陌生，异常处理不是我的强项之一。我正试图编写一款刽子手风格的游戏，但在执行程序时遇到了问题。我收到一条未处理的异常消息，其文本为"（filename）Form1的类型初始值设定项引发了异常。"除了在Program.cs文件中收到消息外，我真的不知道如何找到错误的来源。我在这里找过类似的问题，但答案都是针对个别问题的。在我的情况下，我的代码如下：

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        //set label to blank
        answerLabel.Text = "";
        //loop through each element in the array
        for (int i = 0; i < guessThis.Length; i++)
        {
            //get each element as a question mark
            string unknown = "?";
            //add each element as a "?" to the label
            answerLabel.Text += unknown;
        }
    }
    /*----------------------------------------------------------------------------------------------------------------------------------------------*/
    //initialize array from currentAnswer string
    public static char[] guessThis = currentAnswer.ToCharArray();
    //create array of strings for answers
    public static string[] randomAnswers = new string[10]{"beach", "sword", "sushi", "rat", "joy", "summer", "animal", "baseball", "toyota", "red"};
    //set up random
    public static Random rand1 = new Random();
    //pick a random word from the answers array
    public static string currentAnswer = randomAnswers[rand1.Next(0, randomAnswers.Length)];
    /*----------------------------------------------------------------------------------------------------------------------------------------------*/
    //guess button
    private void button1_Click(object sender, EventArgs e)
    {
        //set a bool for if the user input contains only letters
        bool containsLetter = textBox1.Text.Any(x => char.IsLetter(x));
        //checks if textbox length is not 1 character
        if (textBox1.Text.Length != 1)
        {
            //display error
            MessageBox.Show("Please enter one letter", "Error");
        }
        //if user input is not a letter
        else if (containsLetter != true)
        {
            //display error
            MessageBox.Show("Please enter only letters", "Error");
        }
        //if all conditions satisfied
        else
        {
            //check if char array contains the user input
            if (guessThis.Contains(Convert.ToChar(textBox1.Text)))
            {
                //get index of any element that contains the userinput
                var getIndex = Array.FindIndex(guessThis, row => row.Equals(textBox1.Text));
                //set up another array with the values from the label
                char[] unknownAnswer = answerLabel.Text.ToCharArray();
                //insert user input into the proper index of the char array
                unknownAnswer[getIndex] = Convert.ToChar(textBox1.Text);
                //update the label
                answerLabel.Text = unknownAnswer.ToString();
            }
        }
    }
}

谢谢你提供的任何帮助。