I am Using This Code To Create And Download Ics File....How Can I Use The Below Code To Send Ics File As Mail Attachment ?

public ActionResult iCalendar(string DownloadFileName)
{
DDay.iCal.iCalendar iCal = new DDay.iCal.iCalendar();

// Create the event, and add it to the iCalendar
Event evt = iCal.Create<event>();

// Set information about the event
evt.Start = iCalDateTime.Today.AddHours(8);
evt.End = evt.Start.AddHours(18); // This also sets the duration
evt.Description = "The event description";
evt.Location = "Event location";
evt.Summary = "18 hour event summary";

// Set information about the second event
evt = iCal.Create<event>();
evt.Start = iCalDateTime.Today.AddDays(5);
evt.End = evt.Start.AddDays(1);
evt.IsAllDay = true;
evt.Summary = "All-day event";

// Create a serialization context and serializer factory.
// These will be used to build the serializer for our object.
ISerializationContext ctx = new SerializationContext();
ISerializerFactory factory = new DDay.iCal.Serialization.iCalendar.SerializerFactory();
// Get a serializer for our object
IStringSerializer serializer = factory.Build(iCal.GetType(), ctx) as IStringSerializer;

string output = serializer.SerializeToString(iCal);
var contentType = "text/calendar";
var bytes = Encoding.UTF8.GetBytes(output);

return File(bytes, contentType, DownloadFileName);
}</event></event>