c中的哈希值计算

我正在尝试制作一个程序来计算两个日期的哈希值。日期是文件的创建日期和上次更新的日期时间。在每种情况下，即使更新和创建日期不同，我也会得到相同的have值。我的简单目的是计算两个日期的哈希值并进行比较。请帮我处理代码。更正代码或建议使用任何新代码。提前谢谢。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Security.Cryptography;
namespace ConsoleApplication3
{

    class Program
    {
        static void Main()
        {
            string source, source1;
            FileInfo info = new FileInfo("D:''file.txt");
            DateTime time1 = info.CreationTime;
            Console.WriteLine(time1);
            DateTime time2 = info.LastAccessTime;
            Console.WriteLine(time2);

            DateTime time3 = info.LastWriteTime;
            Console.WriteLine(time3);
            source = Convert.ToString(time1);
            source1 = Convert.ToString(time3);
            using (MD5 md5Hash = MD5.Create())
            {
                string hash = GetMd5Hash(md5Hash, source);
                string hash1 = GetMd5Hash(md5Hash, source1);
                Console.WriteLine("The MD5 hash of" + time1 + "is:" + hash + ".");
                Console.WriteLine("The MD5 hash of" + time3 + "is:" + hash1 + ".");
                if (VerifyMd5Hash(md5Hash, source, hash))
                {
                    Console.WriteLine("The hashes are the same.");
                }
                else
                {
                    Console.WriteLine("The hashes are not same.");
                }
                Console.ReadLine();
            }
        }

        static string GetMd5Hash(MD5 md5Hash, string source1)
        {
            FileInfo info = new FileInfo("D:''file.txt");
            DateTime time3 = info.LastWriteTime;
            source1 = Convert.ToString(time3);
            // Convert the input string to a byte array and compute the hash. 
            byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(source1));
            // Create a new Stringbuilder to collect the bytes 
            // and create a string.
            StringBuilder sBuilder = new StringBuilder();
            // Loop through each byte of the hashed data  
            // and format each one as a hexadecimal string. 
            for (int i = 0; i < data.Length; i++)
            {
                sBuilder.Append(data[i].ToString("x2"));
            }
            // Return the hexadecimal string. 
            return sBuilder.ToString();
        }
        // Verify a hash against a string. 
        static bool VerifyMd5Hash(MD5 md5Hash, string source1, string hash)
        {
            // Hash the input. 
            string hashOfInput = GetMd5Hash(md5Hash, source1);
            // Create a StringComparer an compare the hashes.
            StringComparer comparer = StringComparer.OrdinalIgnoreCase;
            if (0 == comparer.Compare(hashOfInput, hash))
            {
                return true;
            }
            else
            {
                return false;
            }
        }

    }
}