Freedom isn’t free [Tip: When creating a DependencyProperty, follow the handy convention of "wrapper+register+static+virtual"]

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Comments (5)
  1. jimmccurdy says:

    using a lambda expression, you can reduce this pattern to "wrapper+register+virtual" as follows:


    public int MyProperty


    get { return (int)GetValue(MyPropertyProperty); }

    set { SetValue(MyPropertyProperty, value); }


    public static readonly DependencyProperty MyPropertyProperty =

    DependencyProperty.Register("MyProperty", typeof(int), typeof(MyControl),

    new PropertyMetadata(0, (d, e) => ((MyControl)d).OnMyPropertyChanged((int)e.OldValue, (int)e.NewValue)));

    protected virtual void OnMyPropertyChanged(int oldValue, int newValue)


    // TODO: Handle property change



  2. David Anson says:


    Good point, thanks!

    Without analyzing it too much, I don’t think that I’ll switch to this form because it’s been my experience that not everyone is comfortable with lambdas. And sometimes the auto-generated names they have are just painful to look at in the debugger. 😐

    However, it hadn’t occurred to me to use a lambda in this scenario, so I really appreciate the suggestion!

  3. AnthonyWJones says:

    Probably the best way to create dependency properties is to use snippets.  Jeff Wilcox blogs about a useful set here:-

    Tweak’em to preference if necessary

  4. David Anson says:


    Yes, those snippets came out of the team I’m on. 🙂 Ted Glaza wrote them a year or two ago and they’ve been used internally since then.

  5. akjoshi says:

    I think VS itself have snippets for creating DP. I use "propdp" regularly.

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