C#单线程代码断路器不工作

我是C#编程新手，我一直在遵循Ringler C#完整指南，因为我需要演示一个简单的代码转换器，锁定UI，因为当单击任何其他按钮时，它只是单线程的。我遵循了书中的教程，但当我单击“开始”时，它只输入代码，UI完全正常工作。谁能告诉我代码中缺少了什么？多谢各位

public partial class MainWindow : Window
{

    // The simulated code to be broken
    private string Code;
    // The list of Labels of the characters to be broken.
    private List<TextBlock> OutputCharLabels;

    public MainWindow()
    {
        InitializeComponent();

        // Generating a random code to be broken 
        SimulateCodeGeneration();
        // Create a new list of Label controls that show the characters of the code being broken.        
        OutputCharLabels = new List<TextBlock>(4);
        // Add the Label controls to the List        
        OutputCharLabels.Add(txtOutput1);
        OutputCharLabels.Add(txtOutput2);
        OutputCharLabels.Add(txtOutput3);
        OutputCharLabels.Add(txtOutput4);

        //Hide the Stop button initially.
        btnStop.IsEnabled = false;

        // Hide the demo form and show the CodeBreaker 
        showCodeBreaker(); 
    }
    private void SimulateCodeGeneration()
    {
        // A Random number generator.    
        Random loRandom = new Random();
        // The char position being generated    
        int i;
        Code = "";
        for (i = 0; i <= 4; i++)
        {
            // Generate a Random Unicode char for each of the 4 positions                  
            Code += (char)(loRandom.Next(65535));
        }
    }
    private void setDemoVisibility(System.Windows.Visibility pbValue)
    {
        // Change the visibility of the controls related to the demo game.  
        btnGameOver.Visibility = pbValue;
    }

    private void setCodeBreakerVisibility(System.Windows.Visibility pbValue)
    {
        // Change the visibility of the controls related to the CodeBreaking procedure.  
        txtCodeBreaker.Visibility = pbValue;
        txtNumber1.Visibility = pbValue;
        txtNumber2.Visibility = pbValue;
        txtNumber3.Visibility = pbValue;
        txtNumber4.Visibility = pbValue;
        txtOutput1.Visibility = pbValue;
        txtOutput2.Visibility = pbValue;
        txtOutput3.Visibility = pbValue;
        txtOutput4.Visibility = pbValue;
        btnStart.Visibility = pbValue;
        btnHide.Visibility = pbValue;
        btnStop.Visibility = pbValue;
    }
    private void showDemo()
    { // Hide all the controls related to the code
      // breaking procedure.
        setCodeBreakerVisibility(System.Windows.Visibility.Hidden);
        // Change the window title 
        this.Title = "Demo Form";
        // Make the Demo form visable 
        setDemoVisibility(System.Windows.Visibility.Visible);
    }
    private void showCodeBreaker()
    {
        // Hide all the controls related to Demo form
        setDemoVisibility(System.Windows.Visibility.Hidden);
        // Change the window title   
        this.Title = "CodeBreaker Application";
        // Make the code breaker controls visible 
        setCodeBreakerVisibility(System.Windows.Visibility.Visible);
    }
    private bool checkCodeChar(char pcChar, int piCharNumber)
    {
        // Returns a bool value indicating whether the piCharNumber position of the code is the pcChar received.       
        return (Code[piCharNumber] == pcChar);

    }

    private void btnGameOver_Click(object sender, RoutedEventArgs e)
    {
        // Hide the CodeBreaker and show the demo form   
        showDemo(); 
    }

    private void btnStart_Click(object sender, RoutedEventArgs e)
    {
        // This code will break the simulated code.
        // This variable will hold a number to iterate from 1 to 65,535 - Unicode character set.      
        int i;
        // This variable will hold a number to iterate from 0 to 3 (the characters positions in the code to be broken).   
        int liCharNumber;
        // This variable will hold a char generated from the number in i      
        char lcChar;
        // This variable will hold the current Label control that shows the char position being decoded.       
        TextBlock loOutputCharCurrentLabel;
        for (liCharNumber = 0; liCharNumber < 4; liCharNumber++)
        {
            loOutputCharCurrentLabel = OutputCharLabels[liCharNumber];

            // This loop will run 65,536 times        
            for (i = 0; i <= 65535; i++)
            {
                // myChar holds a Unicode char        
                lcChar = (char)(i);
                loOutputCharCurrentLabel.Text = lcChar.ToString();
                if (checkCodeChar(lcChar, liCharNumber))
                {
                    // The code position was found        
                    break;
                }
            }

        }
    }`

公共部分类主窗口：窗口
{
//要破解的模拟代码
私有字符串码；
//要打断的字符的标签列表。
私有列表输出字符标签；
公共主窗口（）
{
初始化组件（）；
//生成要中断的随机码
模拟退化（）；
//创建一个新的标签控件列表，其中显示要中断的代码的字符。
OutputCharLabels=新列表（4）；
//将标签控件添加到列表中
OutputCharLabels.Add（txtOutput1）；
OutputCharLabels.Add（txtOutput2）；
OutputCharLabels.Add（txtOutput3）；
OutputCharLabels.Add（txtOutput4）；
//最初隐藏停止按钮。
btnStop.IsEnabled=false；
//隐藏演示窗体并显示代码生成器
showCodeBreaker（）；
}
私人空间
{
//随机数发生器。
Random loRandom=新的Random（）；
//正在生成的字符位置
int i；
代码=”；
对于（i=0；i）调试代码并跟踪开始按钮代码时会发生什么？只要
checkCodeChar（）
返回true，内部循环就会中断。几乎可以肯定，它不会重复64K次（尽管有注释），我打赌整个方法返回的速度很快，你看不到UI被锁定。用
Thread.Sleep（10000）替换整个按钮处理程序代码
您会看到它被锁定！非常感谢您的回复，这正是发生的事情，它返回得如此之快，以至于我无法演示它被锁定。我需要能够启动代码中断，然后通过点击隐藏按钮锁定程序，所以我无法替换整个按钮处理程序？