System.Net.Mime.HeaderCollection.Get C# (CSharp) Method

        public override string Get(string name)
        {
            if (name == null)
            {
                throw new ArgumentNullException(nameof(name));
            }

            if (name == string.Empty)
            {
                throw new ArgumentException(SR.Format(SR.net_emptystringcall, nameof(name)), nameof(name));
            }

            MailHeaderID id = MailHeaderInfo.GetID(name);

            if (id == MailHeaderID.ContentType && _part != null)
            {
                _part.ContentType.PersistIfNeeded(this, false);
            }
            else if (id == MailHeaderID.ContentDisposition && _part is MimePart)
            {
                ((MimePart)_part).ContentDisposition.PersistIfNeeded(this, false);
            }
            return base.Get(name);
        }