<PackageReference Include="System.ObjectModel" Version="4.0.11-beta-23409" />

PropertyChangingEventHandler

public sealed delegate PropertyChangingEventHandler : MulticastDelegate
Represents the method that will handle the PropertyChanging event of an INotifyPropertyChanging interface.
public PropertyChangingEventHandler(object object, IntPtr method)

public virtual IAsyncResult BeginInvoke(object sender, PropertyChangingEventArgs e, AsyncCallback callback, object object)

public virtual void EndInvoke(IAsyncResult result)

public virtual void Invoke(object sender, PropertyChangingEventArgs e)