如果c#中存在该文件，请重试三次

using System;
using System.IO;

public class Program
{
    public static void Main(string[] args)
    {
        string filePath = "path/to/your/file.txt";
        int maxRetryCount = 3;
        int retryDelayMilliseconds = 1000;

        bool fileExists = false;
        int retryCount = 0;

        while (!fileExists && retryCount < maxRetryCount)
        {
            if (File.Exists(filePath))
            {
                fileExists = true;
                Console.WriteLine("文件存在！");
            }
            else
            {
                retryCount++;
                Console.WriteLine("文件不存在，重试中...");
                System.Threading.Thread.Sleep(retryDelayMilliseconds);
            }
        }

        if (!fileExists)
        {
            Console.WriteLine("重试次数已达上限，文件仍不存在。");
        }
    }
}