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Called when an element of the current collection is about to be set.
protected override void OnSet(int index, object oldValue, object newValue)
Protected Overrides Sub OnSet(index As Integer, oldValue As Object, newValue As Object)
| Type | Name | Description |
|---|---|---|
| int | index | The index of the element. |
| object | oldValue | The old value of the element. |
| object | newValue | The new value of the element. |