C# 清除数组不清除不知道为什么

我用 C# 中的数组编写了这个程序。这是家庭作业。我几乎在程序中编写了所有内容，但我坚持清除数组。我以为我有它，但我不明白它在哪里不起作用。

该程序非常简单。用户输入分数并点击"添加"按钮。然后用户可以输入更多分数（0 到 100 的任何值）。如果用户选择"显示"，程序将对输入的分数进行排序并将其显示在消息框中（完成）如果用户按下"清除分数"按钮，程序应清除分数。我写了它来清除文本框，我还在那里写了"Scores.Clear（）;"（分数是我的列表数组的名称），然后我将焦点返回到我的分数输入文本框，以便用户可以输入另一个分数。

我使用的书只是说清除类型NameOfList.Clear（）;所以我被困在为什么它没有清除。我可以说这不是因为如果我输入更多分数，它会添加总数而不是重新启动。

这是我的完整程序代码。我的清澈开始大约一半。

提前谢谢你。

{
public partial class frmScoreCalculator : Form
{
    //declare a list array for scores
    List<int> Scores = new List<int>();
    //set total and average to 0 
    int Total = 0;
    decimal Average = 0;

    public frmScoreCalculator()
    {
        InitializeComponent();
    }
    //calculate the average by dividing the sum by the number of entries
    private decimal CalculateAverage(int sum, int n)
    {
        Average = sum / n;
        return Average;
    }
    private void frmScoreCalculator_Load(object sender, EventArgs e)
    {
    }
    //closes the program. Escape key will also close the program
    private void btnExit_Click(object sender, EventArgs e)
    {
        this.Close();
    }

    //clears the text boxes, clears the array, returns focus back to the score text box like a boss.
    private void btnClear_Click(object sender, EventArgs e)
    {
        txtScore.Text = "";
        txtCount.Text = "";
        txtTotal.Text = "";
        txtAverage.Text = "";
        Scores.Clear();
        txtScore.Focus();
    }
    //makes sure the score is within the valid range, calculates the average, adds to the number of
    //scores entered, and adds to the total
    private void btnAdd_Click(object sender, EventArgs e)
    {
        if (txtScore.Text == string.Empty)
        {
            txtScore.Focus();
            return;
        }

        int Score = int.Parse(txtScore.Text);
        if (Score > 0 && Score < 100)
        {
            Scores.Add(Score);
            Total += Score;
            txtTotal.Text = Total.ToString();
            txtCount.Text = Scores.Count.ToString();
            Average = CalculateAverage(Total, Scores.Count);
            txtAverage.Text = Average.ToString();
            txtScore.Text = string.Empty;
            txtScore.Focus();
        }
        // if number is not valid, ask user for valid number
        else
        {
            MessageBox.Show("Please enter a number between 0 and 100.", "ENTRY ERROR, DO IT RIGHT!");
        }
        // returns focus to txtNumber
        txtScore.Focus();
        txtScore.Text = "";
    }
    //display button
    private void btnDisplay_Click(object sender, EventArgs e)
    {
        //sorts the scores low to high
        Scores.Sort();
        //displays scores in message box
        string DisplayString = "Sorted Scores :'n'n";
        foreach (int i in Scores)
        {
            DisplayString += i.ToString() + "'n";
        }
        MessageBox.Show(DisplayString);
    }
}

}