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PODependency Property meta throws error when resolved by Unity
 

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  1. PODependency Property meta throws error when resolved by Unity
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    <p>I have a presentationmodel(viewmodel) containing a dependencyy property registered as below..</p> <pre><code>public Field SelectedField { get { return (Field)GetValue(SelectedFieldProperty); } set { SetValue(SelectedFieldProperty, value); } } public static readonly DependencyProperty SelectedFieldProperty = DependencyProperty.Register("SelectedField", typeof(Field), typeof(PresentationModel), new PropertyMetadata(new PropertyChangedEventHandler(onPropertyChangedSelectedField))); private static void onPropertyChangedSelectedField(object sender, PropertyChangedEventArgs e) { throw new NotImplementedException(); } </code></pre> <p>I am resolving the view from a controller like below..</p> <pre><code> IPresentationModel presenter = this.Container.Resolve&lt;IPresentationModel&gt;(); </code></pre> <p>While trying to do, I am getting an error mentioning - Exception occurred while: Calling constructor PresentationModel, when digged in, I noticed that the error is occuring in the below line..</p> <pre><code>public static readonly DependencyProperty SelectedFieldProperty = DependencyProperty.Register("SelectedField", typeof(Field), typeof(PresentationModel), new PropertyMetadata(new PropertyChangedEventHandler(onPropertyChangedSelectedField))); </code></pre> <p>I Identified that the error is due to PropertyChangedEventHandler and DependencyPropertyChangedEventHandler when mentioned in propertymeta data, However, for PropertyChangedCallBack I don't face any error and view is loaded fine. What would be the problem in this..</p>
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    1. COWhat is the Field type? Has it a public constructor? And watch out, you are firing an NotImplementedException in the property changed delegate.
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    2. COField is set to private constructor.. I have even tried the same to changing to public constructor..Same exception. Not Implemented exception should not cause this since the flow doesn't go till there..I have commented the exception and tried.
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