1657394: First set of 20 new SEO descriptions. (#18970)

* First set of 20 new SEO descriptions.
dotnet · Jun 16, 2020 · b13bf01 · b13bf01
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diff --git a/.../additional-apis/xpsdocumentwriter-writingcancelled-event-system-windows-xps.md b/.../additional-apis/xpsdocumentwriter-writingcancelled-event-system-windows-xps.md
@@ -1,5 +1,6 @@
 ---
 title: XpsDocumentWriter._WritingCancelled Event (System.Windows.Xps)
+description: Read about the XpsDocumentWriter._WritingCancelled event, which occurs when an XML Paper Specification (XPS) Write or WriteAsync operation is canceled in .NET.
 ms.date: 10/17/2017
 api_location:
 - system.printing.dll

diff --git a/docs/framework/app-domains/application-domains.md b/docs/framework/app-domains/application-domains.md
@@ -1,5 +1,6 @@
 ---
 title: "Application domains"
+description: Read about application domains, which provide an isolation boundary between applications for security, reliability, versioning, & unloading assemblies in .NET.
 ms.date: "03/30/2017"
 helpviewer_keywords: 
   - "process boundaries for isolation"

diff --git a/docs/framework/app-domains/index.md b/docs/framework/app-domains/index.md
@@ -1,5 +1,6 @@
 ---
 title: "Programming with Application Domains and Assemblies"
+description: Get to know programming with application domains and assemblies in .NET. See links to how-to topics & examples about creating application domains & assemblies.
 ms.date: "03/30/2017"
 helpviewer_keywords: 
   - "assemblies [.NET Framework], programming"

diff --git a/docs/framework/app-domains/retrieve-setup-information.md b/docs/framework/app-domains/retrieve-setup-information.md
@@ -1,5 +1,6 @@
 ---
 title: "Retrieving Setup Information from an Application Domain"
+description: Retrieve setup information from an application domain in .NET using the System.AppDomain class or the AppDomainSetup object.
 ms.date: "03/30/2017"
 dev_langs: 
   - "csharp"

diff --git a/docs/framework/debug-trace-profile/code-contracts.md b/docs/framework/debug-trace-profile/code-contracts.md
@@ -1,5 +1,6 @@
 ---
 title: "Code Contracts"
+description: Explore code contracts, which provide a way to specify preconditions, postconditions, and object invariants in your .NET code.
 ms.date: "09/05/2018"
 dev_langs:
   - "csharp"

diff --git a/docs/framework/debug-trace-profile/jitcompilationstart-mda.md b/docs/framework/debug-trace-profile/jitcompilationstart-mda.md
@@ -1,5 +1,6 @@
 ---
 title: "jitCompilationStart MDA"
+description: Use the jitCompilationStart managed debugging assistant (MDA), which is started to report when the just-in-time (JIT) compiler begins compiling a .NET function.
 ms.date: "03/30/2017"
 helpviewer_keywords: 
   - "JIT compilation"

diff --git a/docs/framework/deployment/how-to-get-progress-from-the-dotnet-installer.md b/docs/framework/deployment/how-to-get-progress-from-the-dotnet-installer.md
@@ -1,5 +1,6 @@
 ---
 title: "How to: Get Progress from the .NET Framework 4.5 Installer"
+description: Learn how to get progress from the .NET 4.5 installer. If you develop apps for this .NET version, you can include (chain) .NET 4.5 setup in your app's setup.
 ms.date: "03/30/2017"
 dev_langs:
   - "cpp"

diff --git a/docs/framework/interop/default-marshaling-for-strings.md b/docs/framework/interop/default-marshaling-for-strings.md
@@ -1,5 +1,6 @@
 ---
 title: "Default Marshaling for Strings"
+description: Review the default marshaling behavior for strings in interfaces, platform invoke, structures, & fixed-length string buffers in .NET.
 ms.date: "03/20/2019"
 dev_langs:
   - "csharp"

diff --git a/docs/framework/interop/marshaling-data-with-platform-invoke.md b/docs/framework/interop/marshaling-data-with-platform-invoke.md
@@ -1,5 +1,6 @@
 ---
 title: "Marshaling Data with Platform Invoke"
+description: Marshal data with platform invoke in .NET. See a list of data types used in Windows APIs and C-style functions, and find their .NET managed type equivalents.
 ms.date: "03/20/2019"
 dev_langs:
   - "cpp"

diff --git a/docs/framework/interop/msgbox-sample.md b/docs/framework/interop/msgbox-sample.md
@@ -1,5 +1,6 @@
 ---
 title: "MsgBox Sample"
+description: See a sample of passing string types by values as In parameters using MsgBox. It shows when to use the EntryPoint, CharSet, and ExactSpelling fields in .NET.
 ms.date: "03/30/2017"
 dev_langs: 
   - "csharp"

diff --git a/docs/framework/performance/interop-etw-events.md b/docs/framework/performance/interop-etw-events.md
@@ -1,5 +1,6 @@
 ---
 title: "Interop ETW Events"
+description: Review interop ETW (event tracing for Windows) events, which capture information about Microsoft intermediate language (MSIL) stub generation & caching in .NET.
 ms.date: "03/30/2017"
 helpviewer_keywords: 
   - "interop events [.NET Framework]"

diff --git a/docs/framework/performance/lazy-initialization.md b/docs/framework/performance/lazy-initialization.md
@@ -1,5 +1,6 @@
 ---
 title: "Lazy Initialization"
+description: Explore lazy initialization in .NET, a performance improvement that means an object creation is deferred until the object is first used.
 ms.date: "03/30/2017"
 dev_langs: 
   - "csharp"

diff --git a/docs/framework/tools/mdbg-exe.md b/docs/framework/tools/mdbg-exe.md
@@ -1,5 +1,6 @@
 ---
 title: "MDbg.exe (.NET Framework Command-Line Debugger)"
+description: Understand MDbg.exe, the command-line debugger for .NET, which helps tools vendors and application developers find and fix bugs in programs targeting the CLR.
 ms.date: "03/30/2017"
 helpviewer_keywords: 
   - "command-line debugger [.NET Framework]"

diff --git a/docs/framework/tools/peverify-exe-peverify-tool.md b/docs/framework/tools/peverify-exe-peverify-tool.md
@@ -1,5 +1,6 @@
 ---
 title: "Peverify.exe (PEVerify Tool)"
+description: Use Peverify.exe (portable executable verify) to help determine if Microsoft intermediate language (MSIL) code & metadata meet type safety standards in .NET.
 ms.date: "03/30/2017"
 helpviewer_keywords: 
   - "portable executable files, PEVerify"

diff --git a/docs/framework/tools/winmdexp-exe-error-messages.md b/docs/framework/tools/winmdexp-exe-error-messages.md
@@ -1,5 +1,6 @@
 ---
 title: "Winmdexp.exe Error Messages"
+description: Understand Winmdexp.exe (Windows runtime metadata export tool) error messages, which only appear during the build process if .NET compilation succeeds.
 ms.date: "03/30/2017"
 f1_keywords: 
   - "WME1095"

diff --git a/...mework/ui-automation/obtain-mixed-text-attribute-details-using-ui-automation.md b/...mework/ui-automation/obtain-mixed-text-attribute-details-using-ui-automation.md
@@ -1,5 +1,6 @@
 ---
 title: "Obtain Mixed Text Attribute Details Using UI Automation"
+description: Obtain mixed text attribute details using the managed UI Automation classes in the System.Windows.Automation namespace of the .NET API.
 ms.date: "03/30/2017"
 dev_langs: 
   - "csharp"

diff --git a/docs/framework/ui-automation/return-properties-from-a-ui-automation-provider.md b/docs/framework/ui-automation/return-properties-from-a-ui-automation-provider.md
@@ -1,5 +1,6 @@
 ---
 title: "Return Properties from a UI Automation Provider"
+description: See how a UI Automation provider can return properties of an element to client applications in .NET.
 ms.date: "03/30/2017"
 dev_langs: 
   - "csharp"

diff --git a/docs/framework/ui-automation/server-side-ui-automation-provider-implementation.md b/docs/framework/ui-automation/server-side-ui-automation-provider-implementation.md
@@ -1,5 +1,6 @@
 ---
 title: "Server-Side UI Automation Provider Implementation"
+description: Understand how to implement a server-side UI Automation provider for a custom control in .NET. Implementation for WPF and non-WPF elements is different.
 ms.date: "03/30/2017"
 helpviewer_keywords:
   - "server-side UI Automation provider implementation"

diff --git a/docs/framework/ui-automation/ui-automation-control-types.md b/docs/framework/ui-automation/ui-automation-control-types.md
@@ -1,5 +1,6 @@
 ---
 title: "UI Automation Control Types"
+description: See the UI Automation control types that are available if you want to use the managed classes in the System.Windows.Automation namespace of the .NET API.
 ms.date: "03/30/2017"
 f1_keywords:
   - "AutoGeneratedOrientationPage"

diff --git a/docs/framework/ui-automation/ui-automation-events-for-clients.md b/docs/framework/ui-automation/ui-automation-events-for-clients.md
@@ -1,5 +1,6 @@
 ---
 title: "UI Automation Events for Clients"
+description: Read about how Microsoft UI Automation events are used by UI Automation clients in .NET. UI Automation allows clients to subscribe to events of interest.
 ms.date: "03/30/2017"
 helpviewer_keywords: 
   - "UI Automation, events for clients"