Base64 Encode/Decode a String

C# example to base-64 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;
}

string s;
s = "A friend called me up the other day and talked about investing in a dot-com that sells lobsters. Internet lobsters. Where will this end? --Donald Trump";

//  Indicate that no encryption should be performed,
//  only encoding/decoding.
crypt.CryptAlgorithm = "none";
crypt.EncodingMode = "base64";

//  Other possible EncodingMode settings are:
//  "quoted-printable", "hex", "uu", "base32", and "url"

string strBase64;
strBase64 = crypt.EncryptStringENC(s);

textBox1.Text += strBase64 + "\r\n";

string decoded;
decoded = crypt.DecryptStringENC(strBase64);

textBox1.Text += decoded + "\r\n";