static void Main(string[] args)
{
string s = "Hi there.";
Encoding encodingUTF8 = Encoding.UTF8;
byte[] encodedBytes = encodingUTF8.GetBytes(s);
Console.WriteLine("Encoded bytes: " + BitConverter.ToString(encodedBytes));
string decodedString = encodingUTF8.GetString(encodedBytes);
Console.WriteLine("Decoded string: " + decodedString);
ASCIIEncoding aSCII = (ASCIIEncoding)Encoding.ASCII;
Console.WriteLine(aSCII.ToString());
}