XamlDirective.LookupIsUnknown Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Returns whether this XamlDirective represents a member that is not resolvable by the backing system that is used for type and member resolution.
protected:
override bool LookupIsUnknown();
protected override sealed bool LookupIsUnknown ();
override this.LookupIsUnknown : unit -> bool
Protected Overrides NotOverridable Function LookupIsUnknown () As Boolean
Returns
true
if this XamlDirective represents a non-resolvable member; otherwise, false
.
Remarks
The XamlDirective implementation only calls base and does nothing more. The base implementation returns the results in this order: the results are based on internal reflection; or the results are based on checking for a null value of the UnderlyingMember. The XamlDirective implementation seals this virtual member; therefore, all XamlDirective types and all predefined XAML directives must use this behavior.
Applies to
意見反應
https://aka.ms/ContentUserFeedback。
即將登場:在 2024 年,我們將逐步淘汰 GitHub 問題作為內容的意見反應機制,並將它取代為新的意見反應系統。 如需詳細資訊,請參閱:提交並檢視相關的意見反應