MimeKit.MimeMessage.ReloadHeader C# (CSharp) Метод

		void ReloadHeader (HeaderId id)
		{
			if (id == HeaderId.Unknown)
				return;

			switch (id) {
			case HeaderId.ResentMessageId:
				resentMessageId = null;
				break;
			case HeaderId.ResentSender:
				resentSender = null;
				break;
			case HeaderId.ResentDate:
				resentDate = DateTimeOffset.MinValue;
				break;
			case HeaderId.References:
				references.Changed -= ReferencesChanged;
				references.Clear ();
				references.Changed += ReferencesChanged;
				break;
			case HeaderId.InReplyTo:
				inreplyto = null;
				break;
			case HeaderId.MessageId:
				messageId = null;
				break;
			case HeaderId.Sender:
				sender = null;
				break;
			case HeaderId.Importance:
				importance = MessageImportance.Normal;
				break;
			case HeaderId.XPriority:
				xpriority = XMessagePriority.Normal;
				break;
			case HeaderId.Priority:
				priority = MessagePriority.Normal;
				break;
			case HeaderId.Date:
				date = DateTimeOffset.MinValue;
				break;
			}

			foreach (var header in Headers) {
				if (header.Id != id)
					continue;

				var rawValue = header.RawValue;
				int number, index = 0;

				switch (id) {
				case HeaderId.MimeVersion:
					if (MimeUtils.TryParse (rawValue, 0, rawValue.Length, out version))
						return;
					break;
				case HeaderId.References:
					references.Changed -= ReferencesChanged;
					foreach (var msgid in MimeUtils.EnumerateReferences (rawValue, 0, rawValue.Length))
						references.Add (msgid);
					references.Changed += ReferencesChanged;
					break;
				case HeaderId.InReplyTo:
					inreplyto = MimeUtils.EnumerateReferences (rawValue, 0, rawValue.Length).FirstOrDefault ();
					break;
				case HeaderId.ResentMessageId:
					resentMessageId = MimeUtils.ParseMessageId (rawValue, 0, rawValue.Length);
					if (resentMessageId != null)
						return;
					break;
				case HeaderId.MessageId:
					messageId = MimeUtils.ParseMessageId (rawValue, 0, rawValue.Length);
					if (messageId != null)
						return;
					break;
				case HeaderId.ResentSender:
					MailboxAddress.TryParse (Headers.Options, rawValue, ref index, rawValue.Length, false, out resentSender);
					if (resentSender != null)
						return;
					break;
				case HeaderId.Sender:
					MailboxAddress.TryParse (Headers.Options, rawValue, ref index, rawValue.Length, false, out sender);
					if (sender != null)
						return;
					break;
				case HeaderId.ResentDate:
					if (DateUtils.TryParse (rawValue, 0, rawValue.Length, out resentDate))
						return;
					break;
				case HeaderId.Importance:
					switch (header.Value.ToLowerInvariant ().Trim ()) {
					case "high": importance = MessageImportance.High; break;
					case "low": importance = MessageImportance.Low; break;
					default: importance = MessageImportance.Normal; break;
					}
					break;
				case HeaderId.Priority:
					switch (header.Value.ToLowerInvariant ().Trim ()) {
					case "non-urgent": priority = MessagePriority.NonUrgent; break;
					case "urgent": priority = MessagePriority.Urgent; break;
					default: priority = MessagePriority.Normal; break;
					}
					break;
				case HeaderId.XPriority:
					ParseUtils.SkipWhiteSpace (rawValue, ref index, rawValue.Length);

					if (ParseUtils.TryParseInt32 (rawValue, ref index, rawValue.Length, out number)) {
						xpriority = (XMessagePriority) Math.Min (Math.Max (number, 1), 5);
					} else {
						xpriority = XMessagePriority.Normal;
					}
					break;
				case HeaderId.Date:
					if (DateUtils.TryParse (rawValue, 0, rawValue.Length, out date))
						return;
					break;
				}
			}
		}