I am looking to send an outlook Meeting Request from C#. i have the code below that it do the job but.
string startTime1 = Convert.ToDateTime(startTime).ToString
If this is a resource mailbox, you can configure it to auto accept meeting invitations (File | Options | Calendar | Automatic Accept or Decline).
If this is an arbitrary mailbox, nothing happens without the owner's permission. The best you can do is directly access the mailbox using the Outlook Object Model / EWS/ MAPI if you have the user credentials.