如何检测 VB.NET 中的观察集合是否发生变化？

嗨伙计。
我有一个观察集。
我使用了 CollectionChanged 事件。
但此事件仅在添加新项目或删除项目时引发。
那么如何检测某个项目是否已编辑呢？
（当然，最好还检测哪个项目获得了版本。）

有什么帮助吗？

我尝试过的：

Imports System.Collections.ObjectModel

Public Class Person
    Public Property Name As String
End Class

Public listORG As New ObservableCollection(Of Person)()

Sub New()
    InitializeComponent()

    Dim names As New List(Of String) From 
        {"Alice", "Bob", "Charlie", "David", "Eve",
         "Frank", "Grace", "Harry", "Ivy", "Jack"}
    Dim rand As New Random()
    For i As Integer = 0 To 29
        Dim index As Integer = rand.Next(names.Count)
        Dim person As New Person With {.Name = names(index)}
        listORG.Add(person)
    Next i

    ' Bind ObservableCollection to DataGrid in WPF
    DGlistORG.ItemsSource = listORG

    AddHandler listORG.CollectionChanged, AddressOf listORG_CollectionChanged
End Sub

Private Sub listORG_CollectionChanged(sender As Object, e As System.Collections.Specialized.NotifyCollectionChangedEventArgs)
    MsgBox("Updated")
End Sub