md5("apple", true) //result :8pѕ'OlIігg(•

byte[] asciiBytes = ASCIIEncoding.ASCII.GetBytes("apple");
    byte[] hashedBytes =  MD5CryptoServiceProvider.Create().ComputeHash(asciiBytes);
    return System.Text.Encoding.ASCII.GetString(hashedBytes); //result: 8p?'OlI??g(?

var md5 = System.Security.Cryptography.MD5.Create();
 byte[] inputBytes = Encoding.Default.GetBytes(input);
 byte[] hash = md5.ComputeHash(inputBytes);

 var s = Encoding.Default.GetString(hash);