ContextItemManager.Unsubscribe 方法 (Type, SubscribeContextCallback)

在衍生類別 (Derived Class) 中遭覆寫時，就會移除訂閱。

命名空間： Microsoft.Windows.Design
組件： Microsoft.Windows.Design.Extensibility (在 Microsoft.Windows.Design.Extensibility.dll 中)

語法

'宣告
Public MustOverride Sub Unsubscribe ( _
    contextItemType As Type, _
    callback As SubscribeContextCallback _
)

public abstract void Unsubscribe(
    Type contextItemType,
    SubscribeContextCallback callback
)

public:
virtual void Unsubscribe(
    Type^ contextItemType, 
    SubscribeContextCallback^ callback
) abstract

abstract Unsubscribe : 
        contextItemType:Type * 
        callback:SubscribeContextCallback -> unit

public abstract function Unsubscribe(
    contextItemType : Type, 
    callback : SubscribeContextCallback
)

例外狀況	條件
ArgumentNullException	contextItemType 或 callback 是 nullNull 參照 (即 Visual Basic 中的 Nothing)。