C# compare different Encoding pattern between UTF8 and UTF32 based on Md5

 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             else
41             {
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($"{nameof(utf8md5)} is equals with {nameof(utf32md5)}");
49             }
50             else
51             {
52                 console.writeline($"{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!