How to create a Dependency property on an existing control?

Question

I have been reading on Dependency properties for a few days and understand how they retrieve the value rather than to set/get them as in CLR properties. Feel free to correct

Answer 1

You can use attached properties for it.

Define your property MyInt:

namespace WpfApplication5
{
    public class MyProperties
    {
        public static readonly System.Windows.DependencyProperty MyIntProperty;

        static MyProperties()
        {
            MyIntProperty = System.Windows.DependencyProperty.RegisterAttached(
                "MyInt", typeof(int), typeof(MyProperties));
        }

        public static void SetMyInt(System.Windows.UIElement element, int value)
        {
            element.SetValue(MyIntProperty, value);
        }

        public static int GetMyInt(System.Windows.UIElement element)
        {
            return (int)element.GetValue(MyIntProperty);
        }
    }
}

Bind label content: