public void WriteGuy(Guy guyToWrite)
        {
            GuyFile = Path.GetFullPath(guyToWrite.Name + ".xml");

            if (File.Exists(GuyFile))
            {
                File.Delete(GuyFile);
            }

            using (Stream outputStream = File.OpenWrite(GuyFile))
            {
                DataContractSerializer serializer = new DataContractSerializer(typeof(Guy));
                serializer.WriteObject(outputStream, guyToWrite);
            }
            OnPropertyChanged("GuyFile");
        }
        public void ReadGuy()
        {
            if (string.IsNullOrEmpty(GuyFile))
            {
                return;
            }

            // If file does not exist, an IO exception occurs here.
            using (Stream inputStream = File.OpenRead(GuyFile))
            {
                DataContractSerializer serializer = new DataContractSerializer(typeof(Guy));

                // If invalid XML, such as a string in a field expected to be an integer, or an invalid enum, a serializer exception occurs here noting that.
                NewGuy = serializer.ReadObject(inputStream) as Guy;
            }
            OnPropertyChanged("NewGuy");
        }