MicrosoftDocs · ghogen · Jan 5, 2021 · Dec 22, 2020 · Dec 23, 2020 · Dec 29, 2020
diff --git a/docs/extensibility/internals/microsoft-help-viewer-sdk.md b/docs/extensibility/internals/microsoft-help-viewer-sdk.md
@@ -1,5 +1,7 @@
 ---
 title: Microsoft Help Viewer SDK | Microsoft Docs
+description: Learn about Visual Studio Help Viewer tasks, such as creating an article, creating a Help Viewer content-branding package, and deploying a set of articles.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 ms.assetid: 620d7dcd-d462-475e-a449-fbfa06ff12c5

diff --git a/docs/extensibility/internals/migrating-a-legacy-language-service.md b/docs/extensibility/internals/migrating-a-legacy-language-service.md
@@ -1,5 +1,7 @@
 ---
 title: Migrating a Legacy Language Service | Microsoft Docs
+description: Learn how to update a language service to the latest version of Visual Studio by updating the project and adding a source.extension.vsixmanifest file.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/miscellaneous-files-project.md b/docs/extensibility/internals/miscellaneous-files-project.md
@@ -1,5 +1,7 @@
 ---
 title: Miscellaneous Files Project | Microsoft Docs
+description: Learn about the two types of editors that can be used to open files in a Visual Studio project and the role of the project in determining which editor to use.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/model-for-source-control-packages.md b/docs/extensibility/internals/model-for-source-control-packages.md
@@ -1,5 +1,7 @@
 ---
 title: Model for Source Control Packages | Microsoft Docs
+description: This model represents a source control implementation. The article shows the names of the classes to make it easier to see how source control is carried out.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/model-of-a-legacy-language-service.md b/docs/extensibility/internals/model-of-a-legacy-language-service.md
@@ -1,5 +1,7 @@
 ---
 title: Model of a Legacy Language Service | Microsoft Docs
+description: Use this model of a minimal language service for the Visual Studio core editor as a guide for creating your own language service.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/nesting-projects.md b/docs/extensibility/internals/nesting-projects.md
@@ -1,5 +1,7 @@
 ---
 title: Nesting Projects | Microsoft Docs
+description: Learn about nesting projects, which allows application developers who use your VSPackage to group similar types of projects together in Visual Studio.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/opening-and-saving-project-items.md b/docs/extensibility/internals/opening-and-saving-project-items.md
@@ -1,5 +1,7 @@
 ---
 title: Opening and Saving Project Items | Microsoft Docs
+description: Learn about different approaches to opening and saving files for your new project type in the Visual Studio IDE.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/optimizing-menu-and-toolbar-commands.md b/docs/extensibility/internals/optimizing-menu-and-toolbar-commands.md
@@ -1,5 +1,7 @@
 ---
 title: Optimizing Menu and Toolbar Commands | Microsoft Docs
+description: Learn how Visual Studio can minimize command confusion caused by adding VSPackages and their corresponding commands.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/...nternals/optional-comparison-of-local-project-folder-to-source-control-store.md b/...nternals/optional-comparison-of-local-project-folder-to-source-control-store.md
@@ -1,5 +1,7 @@
 ---
 title: Compare Project Folder to Source Control Store | Microsoft Docs
+description: In the Source Control Plug-in API, the comparison between the local project folder and source control is accomplished by using SccDirQueryInfo and SccDirDiff.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/options-and-options-pages.md b/docs/extensibility/internals/options-and-options-pages.md
@@ -1,5 +1,7 @@
 ---
 title: Options and Options Pages | Microsoft Docs
+description: Learn about support for options pages, which let you change the values of the options that determine the state of a VSPackage.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/...tensibility/internals/outlining-and-hidden-text-in-a-legacy-language-service.md b/...tensibility/internals/outlining-and-hidden-text-in-a-legacy-language-service.md
@@ -1,5 +1,7 @@
 ---
 title: Outlining and Hidden Text in a Legacy Language Service | Microsoft Docs
+description: This article links to resources to implement outlining and hidden text in a legacy language service.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/outlining-in-a-legacy-language-service.md b/docs/extensibility/internals/outlining-in-a-legacy-language-service.md
@@ -1,5 +1,7 @@
 ---
 title: Outlining in a Legacy Language Service | Microsoft Docs
+description: Learn how to support outlining through the implementation of hidden regions in a legacy language service.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/parameter-info-in-a-legacy-language-service1.md b/docs/extensibility/internals/parameter-info-in-a-legacy-language-service1.md
@@ -1,5 +1,7 @@
 ---
 title: Parameter Info in a Legacy Language Service1 | Microsoft Docs
+description: Learn how to implement the IntelliSense Parameter Info tooltip, which provides users with hints, in a legacy language service.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/parameter-info-in-a-legacy-language-service2.md b/docs/extensibility/internals/parameter-info-in-a-legacy-language-service2.md
@@ -1,5 +1,7 @@
 ---
 title: Parameter Info in a Legacy Language Service2 | Microsoft Docs
+description: Learn how to support the IntelliSense Parameter Info operation for displaying a method signature as the method is typed in a legacy language service.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/persistence-and-the-running-document-table.md b/docs/extensibility/internals/persistence-and-the-running-document-table.md
@@ -1,5 +1,7 @@
 ---
 title: Persistence and the Running Document Table | Microsoft Docs
+description: Learn how projects coordinate document opening, saving, and renaming in the running document table, which tracks document state in the Visual Studio IDE.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/persisting-data-in-the-msbuild-project-file.md b/docs/extensibility/internals/persisting-data-in-the-msbuild-project-file.md
@@ -1,5 +1,7 @@
 ---
 title: Persisting Data in the MSBuild Project File | Microsoft Docs
+description: Learn how to persist data in a project file and use IPersistXMLFragment to maintain the data in the project file across project subtype aggregation levels.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-configuration-for-building.md b/docs/extensibility/internals/project-configuration-for-building.md
@@ -1,5 +1,7 @@
 ---
 title: Project Configuration for Building | Microsoft Docs
+description: Learn how a list of solution configurations for a particular solution is managed by the Solution Configurations dialog box in a new project type.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-configuration-for-managing-deployment.md b/docs/extensibility/internals/project-configuration-for-managing-deployment.md
@@ -1,5 +1,7 @@
 ---
 title: Project Configuration for Managing Deployment | Microsoft Docs
+description: Learn about deployment to the expected location for debugging and installation and the two ways Visual Studio supports projects that support deployment.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-configuration-for-output.md b/docs/extensibility/internals/project-configuration-for-output.md
@@ -1,5 +1,7 @@
 ---
 title: Project Configuration for Output | Microsoft Docs
+description: Learn about the build processes that every configuration can support and the interfaces and methods by which output items can be made available.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-configuration-object.md b/docs/extensibility/internals/project-configuration-object.md
@@ -1,5 +1,7 @@
 ---
 title: Project Configuration Object | Microsoft Docs
+description: Learn how the project configuration object manages the display of configuration information to the UI.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-context.md b/docs/extensibility/internals/project-context.md
@@ -1,5 +1,7 @@
 ---
 title: Project Context | Microsoft Docs
+description: Learn how the Visual Studio IDE uses project context to determine how to perform operations when the user adds or works with projects and project items.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-model-core-components.md b/docs/extensibility/internals/project-model-core-components.md
@@ -1,5 +1,7 @@
 ---
 title: Project Model Core Components | Microsoft Docs
+description: This article contains descriptions of the interfaces and services identified in the project model core, and the interfaces and services associated with objects.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-modeling.md b/docs/extensibility/internals/project-modeling.md
@@ -1,5 +1,7 @@
 ---
 title: Project Modeling | Microsoft Docs
+description: Learn about the standard project objects that are required to create automation for your new project type and the path that project automation follows.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-persistence.md b/docs/extensibility/internals/project-persistence.md
@@ -1,5 +1,7 @@
 ---
 title: Project Persistence | Microsoft Docs
+description: Learn about persistence in the design of your project, including the use of IPersistFileFormat to persist both file and non-file-based project objects.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-priority.md b/docs/extensibility/internals/project-priority.md
@@ -1,5 +1,7 @@
 ---
 title: Project Priority | Microsoft Docs
+description: Learn about the priority scheme that the Visual Studio IDE uses determine the best project for opening an item if the item is a member of more than one project.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-property-user-interface.md b/docs/extensibility/internals/project-property-user-interface.md
@@ -1,5 +1,7 @@
 ---
 title: Project Property User Interface | Microsoft Docs
+description: Learn how project subtypes can modify the project Property Pages dialog box as supplied by the base project.
+ms.custom: SEO-VS-2020
 ms.date: 03/22/2018
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-subtypes-design.md b/docs/extensibility/internals/project-subtypes-design.md
@@ -1,5 +1,7 @@
 ---
 title: Project Subtypes Design | Microsoft Docs
+description: Learn how project subtypes let VSPackages extend projects based on the Microsoft Build Engine (MSBuild).
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-subtypes.md b/docs/extensibility/internals/project-subtypes.md
@@ -1,5 +1,7 @@
 ---
 title: Project Subtypes | Microsoft Docs
+description: Learn how project subtypes let you customize behavior of the project systems of Visual Studio. VSPackages implement project subtypes using COM aggregation.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-type-design-decisions.md b/docs/extensibility/internals/project-type-design-decisions.md
@@ -1,5 +1,7 @@
 ---
 title: Project Type Design Decisions | Microsoft Docs
+description: Learn about the item, project file persistence, and commitment mechanic design decisions to make before you extend Visual Studio by creating a new project type.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-type-essentials.md b/docs/extensibility/internals/project-type-essentials.md
@@ -1,5 +1,7 @@
 ---
 title: Project Type Essentials | Microsoft Docs
+description: Learn about when you must create a project type and when you can extend an existing project type by using project subtypes.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-types-architecture.md b/docs/extensibility/internals/project-types-architecture.md
@@ -1,5 +1,7 @@
 ---
 title: Project Types Architecture | Microsoft Docs
+description: This article links to articles which contain detailed information about the architecture of project types in Visual Studio.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/project-types.md b/docs/extensibility/internals/project-types.md
@@ -1,5 +1,7 @@
 ---
 title: Project Types | Microsoft Docs
+description: Visual Studio includes several project types for languages such as Visual C# and Visual Basic. Visual Studio also lets you create your own project types.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/projects.md b/docs/extensibility/internals/projects.md
@@ -1,5 +1,7 @@
 ---
 title: Projects | Microsoft Docs
+description: Learn about the ways that VSPackages can extend the Visual Studio project system, including project types, project subtypes, and custom tools.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/.../extensibility/internals/properties-and-methods-extended-by-project-subtypes.md b/.../extensibility/internals/properties-and-methods-extended-by-project-subtypes.md
@@ -1,5 +1,7 @@
 ---
 title: Properties and Methods Extended by Project Subtypes | Microsoft Docs
+description: Learn about features that project subtypes can enhanced or modified, which lets you customize the behavior of the project systems of Visual Studio.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/properties-display-grid.md b/docs/extensibility/internals/properties-display-grid.md
@@ -1,5 +1,7 @@
 ---
 title: Properties Display Grid | Microsoft Docs
+description: Learn where the property names and property values fields are found in the grid in the Properties window and how to work with the grid in extending properties.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/properties-window-buttons.md b/docs/extensibility/internals/properties-window-buttons.md
@@ -1,5 +1,7 @@
 ---
 title: Properties Window Buttons | Microsoft Docs
+description: Learn about buttons displayed by default on the toolbar for the Properties window and about the implementation of the buttons.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/properties-window-fields-and-interfaces.md b/docs/extensibility/internals/properties-window-fields-and-interfaces.md
@@ -1,5 +1,7 @@
 ---
 title: Properties Window Fields and Interfaces | Microsoft Docs
+description: Learn about the selection that determines what information is displayed in the Properties window based on the window that has focus in the Visual Studio IDE.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/properties-window-object-list.md b/docs/extensibility/internals/properties-window-object-list.md
@@ -1,5 +1,7 @@
 ---
 title: Properties Window Object List | Microsoft Docs
+description: Learn about the interfaces used to interact with the object list in the Properties window in the Visual Studio IDE.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/properties-window-overview.md b/docs/extensibility/internals/properties-window-overview.md
@@ -1,5 +1,7 @@
 ---
 title: Properties Window Overview | Microsoft Docs
+description: Learn about the interfaces used to interact with the Properties window in the Visual Studio IDE in this overview.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/property-pages.md b/docs/extensibility/internals/property-pages.md
@@ -1,5 +1,7 @@
 ---
 title: Property Pages | Microsoft Docs
+description: Learn about working with Properties Pages for your new project type in the Visual Studio SDK, which allow users to view and change project properties.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/providing-automation-for-code.md b/docs/extensibility/internals/providing-automation-for-code.md
@@ -1,5 +1,7 @@
 ---
 title: Providing Automation for Code | Microsoft Docs
+description: Learn about implementing a code model, which requires implementing interfaces that are determined by your internal data structure.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/providing-automation-for-vspackages.md b/docs/extensibility/internals/providing-automation-for-vspackages.md
@@ -1,5 +1,7 @@
 ---
 title: Providing Automation for VSPackages | Microsoft Docs
+description: Learn about how to provide automation for your VSPackages by implementing VSPackage-specific objects and by implementing standard automation objects.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/query-edit-query-save-source-control-vspackage.md b/docs/extensibility/internals/query-edit-query-save-source-control-vspackage.md
@@ -1,5 +1,7 @@
 ---
 title: Query Edit Query Save (Source Control VSPackage) | Microsoft Docs
+description: Learn about the role of Query-Edit Query-Save events and how they are handled by the source control VSPackage.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/quick-info-in-a-legacy-language-service.md b/docs/extensibility/internals/quick-info-in-a-legacy-language-service.md
@@ -1,5 +1,7 @@
 ---
 title: Quick Info in a Legacy Language Service | Microsoft Docs
+description: Learn about support for the IntelliSense Quick Info operation for displaying information about an identifier.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/rdt-readlock-usage.md b/docs/extensibility/internals/rdt-readlock-usage.md
@@ -1,5 +1,7 @@
 ---
 title: RDT_ReadLock Usage | Microsoft Docs
+description: Learn about the _VSRDTFLAGS.RDT_ReadLock flag, which provides logic for locking a document in the Running Document Table.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/reformatting-code-in-a-legacy-language-service.md b/docs/extensibility/internals/reformatting-code-in-a-legacy-language-service.md
@@ -1,5 +1,7 @@
 ---
 title: Reformatting Code in a Legacy Language Service | Microsoft Docs
+description: Learn about enabling support for source code reformatting for a Visual Studio legacy language service.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/registering-a-legacy-language-service1.md b/docs/extensibility/internals/registering-a-legacy-language-service1.md
@@ -1,5 +1,7 @@
 ---
 title: Registering a Legacy Language Service1 | Microsoft Docs
+description: Learn about the registering a legacy language service from a VSPackage with Visual Studio by adding registry keys and entries.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/registering-a-legacy-language-service2.md b/docs/extensibility/internals/registering-a-legacy-language-service2.md
@@ -1,5 +1,7 @@
 ---
 title: Registering a Legacy Language Service2 | Microsoft Docs
+description: This article lists registry entries for the various language service options available in Visual Studio.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/registering-a-project-type.md b/docs/extensibility/internals/registering-a-project-type.md
@@ -1,5 +1,7 @@
 ---
 title: Registering a Project Type | Microsoft Docs
+description: Learn about creating registry entries that enable Visual Studio to recognize and work with your new project type.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords:

diff --git a/docs/extensibility/internals/registering-interop-assembly-command-handlers.md b/docs/extensibility/internals/registering-interop-assembly-command-handlers.md
@@ -1,5 +1,7 @@
 ---
 title: Registering Interop Assembly Command Handlers | Microsoft Docs
+description: Learn about the basic command contract used by all VSPackages implementing commands using Interop assemblies.
+ms.custom: SEO-VS-2020
 ms.date: 11/04/2016
 ms.topic: conceptual
 helpviewer_keywords: