Quoted-Printable Encode/Decode a String

C# example to quoted-printable encode and decode a string.

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Chilkat.Crypt2 crypt = new Chilkat.Crypt2();

//  Any string argument automatically begins the 30-day trial.
bool success;
success = crypt.UnlockComponent("30-day trial");
if (success != true) {
    textBox1.Text += crypt.LastErrorText + "\r\n";
    return;
}

//  Here's a string in Icelandic using non us-ascii chars:
string s;
s = "Ég get etið gler án þess að meiða mig.";

crypt.CryptAlgorithm = "none";
crypt.EncodingMode = "quoted-printable";

//  Quoted-printable encode/decode the iso-8859-1
//  representation of the string.  Notice how each
//  Icelandic char is represented by 1 byte:
crypt.Charset = "iso-8859-1";
string qp;
qp = crypt.EncryptStringENC(s);
textBox1.Text += "iso-8859-1:" + "\r\n";
textBox1.Text += qp + "\r\n";
string decoded;
decoded = crypt.DecryptStringENC(qp);
textBox1.Text += decoded + "\r\n";

//  Now do the same using utf-8. Notice how each
//  Icelandic char is represented by 2 bytes in utf-8:
crypt.Charset = "utf-8";

qp = crypt.EncryptStringENC(s);
textBox1.Text += "utf-8:" + "\r\n";
textBox1.Text += qp + "\r\n";

decoded = crypt.DecryptStringENC(qp);
textBox1.Text += decoded + "\r\n";