[C#/VB.NET] Hash MD5 fornisce risultati differenti da altre implementazioni

[Max Mercury]

Dunque per fare delle prove ho scritto questo codice in .NET

MD5 md5Hash = new MD5CryptoServiceProvider();

            byte[] passwordByteASCII = Encoding.ASCII.GetBytes("1");
            byte[] passwordByteUnicode = Encoding.Unicode.GetBytes("1");
            byte[] passwordByteUTF32 = Encoding.UTF32.GetBytes("1");
            byte[] passwordByteUTF7 = Encoding.UTF7.GetBytes("1");
            byte[] passwordByteUTF8 = Encoding.UTF8.GetBytes("1");

            Console.WriteLine("Hash stringa ASCII " + Convert.ToBase64String(md5Hash.ComputeHash(passwordByteASCII)));
            Console.WriteLine("Hash stringa UTF7 " + Convert.ToBase64String(md5Hash.ComputeHash(passwordByteUTF7)));
            Console.WriteLine("Hash stringa UTF8 " + Convert.ToBase64String(md5Hash.ComputeHash(passwordByteUTF8)));
            Console.WriteLine("Hash stringa Unicode " + Convert.ToBase64String(md5Hash.ComputeHash(passwordByteUnicode)));
            Console.WriteLine("Hash stringa UTF32 " + Convert.ToBase64String(md5Hash.ComputeHash(passwordByteUTF32))); 

che da come risultato :

Hashing in MD5 della stringa '1'

Hash stringa ASCII xMpCOKC5I4INzFCab3WEmw==
Hash stringa UTF7 xMpCOKC5I4INzFCab3WEmw==
Hash stringa UTF8 xMpCOKC5I4INzFCab3WEmw==
Hash stringa Unicode BtSWMsncm8tirq75lhK6aw==
Hash stringa UTF32 1dEUT+c5VKp01UJn4NEOeg==

la stessa stringa con l'MD5 che mi ero scaricato ha il valore
c4ca4238a0b923820dcc509a6f75849b