Move email to folder

Question

I want to move email inbox to another folder, all that email which subject contain only numeric string. i used IMAP but Exression.Subject cant accept the regex and i am unable to move email according to below condition.

 

List uidss = imap.GetAll(); // uidss gets the all email in inbox

 

List uidss = imap.Search(Expression.Subject(@"^[0-9]")); // search this condition on all email

 

foreach (long uid in uidss) 

{

    

   long mvid = (long)imap.MoveByUID(uid, "new"); // move email by email id to new name folder

   MvEml.Add(mvid);

}