public static void Run()
{
//ExStart:InsertHeaderAtSpecificLocation
// The path to the File directory.
string dataDir = RunExamples.GetDataDir_IMAP();
string loadFile = dataDir + "InsertHeaders.eml";
MailMessage eml = MailMessage.Load(loadFile);
eml.Headers.Insert("secret-header", "mystery1");
eml.Save(dataDir + "Updated-MessageHeaders_out.eml");
//ExEnd:InsertHeaderAtSpecificLocation
}
}