internal void HandleReadReceipt(MessageItem message) { if (message == null) { throw new ArgumentNullException("message"); } if (Utilities.GetQueryStringParameter(base.Request, "sndrct", false) != null) { message.SendReadReceipt(); this.Infobar.AddMessageLocalized(641302712, InfobarMessageType.Informational); return; } if (!this.IsEmbeddedItem) { InfobarMessageBuilder.AddSendReceiptNotice(base.UserContext, this.Infobar, message); } }