NSObservedChange.OldValue Property
Definition
Important
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The previous value on the observed property.
public Foundation.NSObject OldValue { get; }member this.OldValue : Foundation.NSObjectProperty Value
The old value.
Remarks
For this property to have a value, the options passed to AddObserver(NSObject, String, NSKeyValueObservingOptions, IntPtr) method should contain the value E:Foundation.NSKeyValueObseringOptions.Old.