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Performs additional custom processes before setting a value in the CollectionBase instance.
protected override void OnSet(int index, object oldValue, object newValue)
| Type | Name | Description |
|---|---|---|
| int | index | The zero-based index at which oldValue can be found. |
| object | oldValue | The value to replace with newValue. |
| object | newValue | The new value of the element at index. |