MailHeaders.Add Method (String, Object)

Adds an header field at the end of the MailHeaders object.

public int Add(
string key,
object value
);

The MailHeaders index at which the value has been added.

Exception Type	Condition
ArgumentNullException	key is a null reference (Nothing is Visual Basic).
ArgumentException	key is an empty string -or- The header value is invalid.

This sample shows how to add and header field to a Mail object.

Mail oMail = new Mail();
oMail.Headers.Add("X-Private-Field", GetPrivateFieldString());