private void AddLogItem(LogItem logItem)
		{
			this.log.Items.Insert(0, logItem);
			this.log.SelectedItem = logItem;
		}
		private void WriteToLog(string message)
		{
			LogItem logItem = new LogItem(message);
			Dispatcher.BeginInvoke(new Action<LogItem>(AddLogItem), logItem);
		}