How to navigate image source to another xaml? c# windows store app

Decalre class in another class file.

private void button1_Click(object sender, RoutedEventArgs e)
        {
        }

file : abc.cs:

public class abc
    {
        public string str1 { get; set; }
        public ImageSource image1 { get; set; }
    }

button click event:

private void button1_Click(object sender, RoutedEventArgs e)
        {
         abc a1 = new abc();
a1.str = txtbox1.text;
a1.image1 = bg2;
this.Frame.Navigate(typeof(MultiGame),a1);
        }

multigame.xaml.cs :

protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            abc a1 = e.Parameter as abc;
            Debug.WriteLine(a1.str);
            image.Source = a1.image1;
        }