1 using System; 2 using System.Text; 3 using System.IO; 4 using System.Security.Cryptography; 5 6 static void Main(string[] args) 7 { 8 CompareFileGetBytes("lyf.txt"); 9 Console.ReadLine();10 }11 12 static void CompareFileGetBytes(string fileFullName)13 {14 byte[] fileReadAllBytes = File.ReadAllBytes(fileFullName);15 string fileReadAllBytesMd5 = GetBytesMd5(fileReadAllBytes);16 17 string utf8Md5 = string.Empty;18 using (StreamReader reader = new StreamReader(fileFullName))19 {20 string textResult = reader.ReadToEnd();21 byte[] utf8Bytes = Encoding.UTF8.GetBytes(textResult);22 utf8Md5 = GetBytesMd5(utf8Bytes);23 }24 25 string utf32Md5 = string.Empty;26 using (StreamReader utf32Reader = new StreamReader(fileFullName))27 {28 string textResult = utf32Reader.ReadToEnd();29 byte[] utf32Bytes = Encoding.UTF32.GetBytes(textResult);30 utf32Md5 = GetBytesMd5(utf32Bytes);31 }32 33 34 Console.WriteLine($"fileReadAllBytesMd5:{fileReadAllBytesMd5},utf8Md5:{utf8Md5}");35 36 if (string.Equals(fileReadAllBytesMd5, utf8Md5))37 {38 Console.WriteLine($"{nameof(fileReadAllBytesMd5)} is equal with {nameof(utf8Md5)}!");39 }40 else41 {42 Console.WriteLine($"{nameof(fileReadAllBytesMd5)} is not equal with {nameof(utf8Md5)}!");43 }44 45 Console.WriteLine($"utf8Md5:{utf8Md5},utf32Md5:{utf32Md5}");46 if (string.Equals(utf8Md5, utf32Md5))47 {48 Console.WriteLine($"{nameof(utf8Md5)} is equals with {nameof(utf32Md5)}");49 }50 else51 {52 Console.WriteLine($"{nameof(utf8Md5)} is not equals with {nameof(utf32Md5)}");53 }54 }55 56 static string GetBytesMd5(byte[] bytesData)57 {58 StringBuilder md5Builder = new StringBuilder();59 using(MD5CryptoServiceProvider md5=new MD5CryptoServiceProvider())60 {61 byte[] md5Bytes = md5.ComputeHash(bytesData);62 for(int i=0;i<md5Bytes.Length;i++)63 {64 md5Builder.Append(md5Bytes[i].ToString("x2"));65 }66 }67 return md5Builder.ToString();68 }
I had validated that different encoding mode can generate different result,they are not identical.
Besides,the File.ReadAllBytes may based on UTF8 because they render the identical result!
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