WPF

public class Colour
{
    public string Description { get; set; }

    public override bool Equals(object obj)
    {
        return this.Description == (obj as Colour).Description;
    }

    public override int GetHashCode()
    {
        return base.GetHashCode() ^ this.Description.GetHashCode();
    }
}

public static DependencyProperty SelectedColourProperty =
            DependencyProperty.Register("SelectedColour", typeof(Colour), typeof(ViewModel));
public Colour SelectedColour
{
    get { return (Colour)GetValue(SelectedColourProperty); }
    set { SetValue(SelectedColourProperty, value); }
}

Mark Salsbery
Microsoft MVP - Visual C++

public class Colour
{
   public string Description { get; set; }
    public override bool Equals(object obj)
    {
        if(obj.GetType()== typeof(Colour))
        return this.Description == ((Colour) obj).Description;

        return base.Equals(obj);
    }

    public override int GetHashCode()
    {
        return base.GetHashCode() ^ this.Description.GetHashCode();
    }


}

pavanip wrote:

Can please anyone help me how to do that task using silverlight and .Net.