Visual Studio 2010 – Visual Basic New Feature – NonSerialized Events

A long time feature request has been added to Visual Basic 10 that ships with Visual Studio 2010; decorating an Event as NonSerialized.

In prior versions of Visual Basic, developers had to implement a Custom Event or another workaround when their types needed to expose an Event and they had to be Serializable. C# had this capability, now Visual Basic does too!

A very common scenario is a class that implements INotifyPropertyChanged and must also be Serializable.

Visual Basic developers can now decorate the Event with the NonSerialized attribute. The compiler does the rest for you.

Imports System.ComponentModel

<Serializable()>
Public Class Customer
    Implements INotifyPropertyChanged

#Region " INotifyPropertyChanged Serializable "

    'New VB 10 feature!
    <NonSerialized()>
    Public Event PropertyChanged(
                  ByVal sender As Object,
                  ByVal e As System.ComponentModel.PropertyChangedEventArgs) _
                  Implements System.ComponentModel.INotifyPropertyChanged.PropertyChanged

    Protected Sub OnPropertyChanged(ByVal strPropertyName As String)
        If Me.PropertyChangedEvent IsNot Nothing Then
            RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(strPropertyName))
        End If
    End Sub

#End Region

End Class

Have a great day.

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