如何修复"无法打开剪贴板:拒绝访问"错误？

using System;
using System.Windows.Forms;

public class ClipboardHelper
{
    public static string GetTextFromClipboard()
    {
        string clipboardText = string.Empty;
        int retryCount = 5;

        while (retryCount > 0)
        {
            try
            {
                if (Clipboard.ContainsText())
                {
                    clipboardText = Clipboard.GetText();
                }
                break;
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error accessing clipboard: " + ex.Message);
                System.Threading.Thread.Sleep(100); // 等待一段时间后重试
                retryCount--;
            }
        }

        return clipboardText;
    }
}