C# wpf使进度条可从方法访问

我编写了一个代码，将不同单词的数量放入数据网格中的txt文件中。现在我正在尝试添加进度条，但我无法通过组织单词的方法访问它。不幸的是，有人告诉我必须在一个方法中拆分、计数等单词（我不能在start（）中执行）。有人知道怎么做吗

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        
    }
    
    private void start(object sender, RoutedEventArgs e)
    {
        string path = txtbox_path.Text;
        string unordered = readFile(path);
        var ordered = count(unordered);
        progressbar_1.Maximum = ordered.Count;
        foreach(var obj in ordered)
        {
            datagrid_table.Items.Add(obj);
            progressbar_1.Value += 1;
        }
    }
    private string readFile(string filePath)
    {
        string content = string.Empty;
        try
        {
            content = File.ReadAllText(filePath);
        }
        catch (Exception e)
        {
            lbl_warning.Content=e.Message;
        }
        return content;
    }
    public static IDictionary count(string input)
    {
        var split = input.Split();
        var grouped = split.GroupBy(x => x);
        var ordered = grouped.OrderBy(x => x.Key);
        
        var counted = from s in ordered
                      select new
                      {
                          word = s.Key,
                          number = split.Where(x => x.Equals(s.Key)).Count()
                      };
        
        var asList = counted.ToList();
        
        var orderedByNumber = asList.OrderByDescending(x => x.number);
       

        var whitespacesRemoved = orderedByNumber.Where(x => !String.IsNullOrWhiteSpace(x.word));
       
        var asDict = whitespacesRemoved.ToDictionary(p => p.word, p => p.number);
       
        return asDict;
    }

    private void stop(object sender, RoutedEventArgs e)
    {
        this.Close();
    }
}

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您的代码的哪一部分花费了如此长的时间以至于进度条会很有用？如果文件的读取、评估或UI中的显示？我试图在count（）中使用它，但不要使

count（）

为静态，您可以访问ProgressBar对象。请注意：*