The default value type does not match the type of the property

c#, wpf, wpf-controls

Solution

`Default value` for `DP` does not match your type.

Change

public static readonly DependencyProperty ToothProperty =
        DependencyProperty.Register("Tooth", typeof(Tooth), typeof(ToothUI),
                                         new PropertyMetadata(0));

to

public static readonly DependencyProperty ToothProperty =
        DependencyProperty.Register("Tooth", typeof(Tooth), typeof(ToothUI),
                                      new PropertyMetadata(default(Tooth)));

Or simply omit setting default value for your DP:

public static readonly DependencyProperty ToothProperty =
        DependencyProperty.Register("Tooth", typeof(Tooth), typeof(ToothUI));

Problem

I have this class ``` public class Tooth { public string Id {get;set;} } ``` And this custrom control ``` public partial class ToothUI : UserControl { public ToothUI() { InitializeComponent(); } public Tooth Tooth { get { return (Tooth)GetValue(ToothProperty); } set { SetValue(ToothProperty, value); NombrePieza.Text = value.Id.Replace("_",String.Empty); } } public static readonly DependencyProperty ToothProperty = DependencyProperty.Register("Tooth", typeof(Tooth), typeof(ToothUI), new PropertyMetadata(0)); } ``` My problem is after Add Tooth dependency property, this error happen The default value type does not match the type of the property What exactly this error mean? What is the current way to set this `DP`

Original source