CommandManager.RequerySuggested Event

 
System_CAPS_noteNote

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Occurs when the CommandManager detects conditions that might change the ability of a command to execute.

Namespace:   System.Windows.Input
Assembly:  PresentationCore (in PresentationCore.dll)

public static event EventHandler RequerySuggested

Since this event is static, it will only hold onto the handler as a weak reference. Objects that listen for this event should keep a strong reference to their event handler to avoid it being garbage collected. This can be accomplished by having a private field and assigning the handler as the value before or after attaching to this event.

.NET Framework
Available since 3.0
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