C# 如何判断两个文件内容是否相同的方法

public static bool isValidFileContent(string filePath1, string filePath2)
       {
           //创建一个哈希算法对象
           using (HashAlgorithm hash = HashAlgorithm.Create())
           {
               using (FileStream file1 = new FileStream(filePath1, FileMode.Open),file2=new FileStream(filePath2,FileMode.Open))
               {
                   byte[] hashByte1 = hash.ComputeHash(file1);//哈希算法根据文本得到哈希码的字节数组
                   byte[] hashByte2 = hash.ComputeHash(file2);
                   string str1 = BitConverter.ToString(hashByte1);//将字节数组装换为字符串
                   string str2 = BitConverter.ToString(hashByte2);
                   return (str1==str2);//比较哈希码
               }
           }
       }

static void Main(string[] args)
     {
         string filePath1 = @"f:/1.txt";
         string filePath2 = @"f:/2.txt";
         bool valid=isValidFileContent(filePath1, filePath2);
         Console.WriteLine(valid.ToString());
         Console.ReadKey();
     }