public class Photo : BaseModel
    {
        public Photo(string path, int n)
        {
            _path = path;
            _source = new Uri(path);
            _name = Path.GetFileNameWithoutExtension(path);
            _numb = n;
        }

        public override string ToString()
        {
            return _source.ToString();
        }

        private string _path;
        public string FullPath { get { return _path; } }

        private int _numb;
        public int PhotoNumber { get { return _numb; } set { _numb = value; } }

        private string _name;
        public string FileName { get { return _name; }}

        private Uri _source;
        public string Source { get { return _path; } }
    }

<Slider Name="ZoomSlider" 
                    Margin="10,0,0,0" 
                    Orientation="Horizontal" 
                    Minimum="80" 
                    Maximum="320" 
                    Value="160" 
                    TickFrequency="80"
                    TickPlacement="BottomRight" 
                    SmallChange="5"
                    LargeChange="20" Foreground="Black" />