private int SearchSameSubject(string emailSubject)
{
List <string> subjects = new List <string>();
EmailRepository parentEmails = new EmailRepository();
subjects = parentEmails.GetAllSubjects();
string emailSubjectRe = emailSubject.Substring(5);
string subject = subjects.Find(sub => emailSubjectRe == sub);
if (subject != null)
{
int emailParentId = parentEmails.GetParentEmailIdsub(subject);
if (!(emailParentId == -1))
{
return(emailParentId);
}
}
return(-1);
}