Add What's new in September (#20890)

* Add What's new in September

Run the automated tool for September 2020.

* Apply suggestions from code review

Co-authored-by: Scott Addie <10702007+scottaddie@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Scott Addie <10702007+scottaddie@users.noreply.github.com>

* add import code analysis rules.

Co-authored-by: Scott Addie <10702007+scottaddie@users.noreply.github.com>

docs/whats-new/2020-09.md

@@ -0,0 +1,122 @@
+---
+title: ".NET docs: What's new for September 1, 2020 - September 30, 2020"
+description: "What's new in the .NET docs for September 1, 2020 - September 30, 2020."
+ms.date: 10/02/2020
+---
+
+# .NET docs: What's new for September 1, 2020 - September 30, 2020
+
+Welcome to what's new in the .NET docs from September 1, 2020 through September 30, 2020. This article lists some of the major changes to docs during this period.
+
+## .NET
+
+### New articles
+
+- [Platform compatibility analyzer](../standard/analyzers/platform-compat-analyzer.md) - Conceptual doc for platform compat analyzer
+- [Basic Queries (LINQ to XML)](../standard/linq/basic-queries-linq-to-xml.md) - Add orphans to TOC
+
+## .NET Core
+
+### New articles
+
+- [Options pattern in .NET](../core/extensions/options.md) - Port over .NET Options Pattern article to finalize Microsoft Extensions fundamentals
+- [Implement a custom logging provider in .NET](../core/extensions/custom-logging-provider.md) - Port logging articles - adapt to .NET docs
+- [High-performance logging in .NET](../core/extensions/high-performance-logging.md) - Port logging articles - adapt to .NET docs
+- [Logging providers in .NET](../core/extensions/logging-providers.md) - Port logging articles - adapt to .NET docs
+- [Logging in .NET](../core/extensions/logging.md) - Port logging articles - adapt to .NET docs
+- [Dependency injection guidelines](../core/extensions/dependency-injection-guidelines.md) - Introduce and port over dependency injection articles for Microsoft Extensions
+- [Tutorial: Use dependency injection in .NET](../core/extensions/dependency-injection-usage.md) - Introduce and port over dependency injection articles for Microsoft Extensions
+- [Dependency injection in .NET](../core/extensions/dependency-injection.md) - Introduce and port over dependency injection articles for Microsoft Extensions
+- [.NET Generic Host](../core/extensions/generic-host.md) - Add Generic Host article
+- [Configuration providers in .NET](../core/extensions/configuration-providers.md) - Config fundamentals
+- [Configuration in .NET](../core/extensions/configuration.md) - Config fundamentals
+- [Implement a custom configuration provider in .NET](../core/extensions/custom-configuration-provider.md) - Config fundamentals
+- [Collect diagnostics in containers](../core/diagnostics/diagnostics-in-containers.md) - Add documentation on diagnosing .NET Core performance issues in containers
+- [Breaking changes in Windows Presentation Framework (WPF)](../core/compatibility/wpf.md) - WinForms and WPF SDK - breaking change
+- [Debug Linux dumps](../core/diagnostics/debug-linux-dumps.md) - Linux dump debugging docs
+- [SOS installer (dotnet-sos)](../core/diagnostics/dotnet-sos.md) - Linux dump debugging docs
+- [Symbol downloader (dotnet-symbol)](../core/diagnostics/dotnet-symbol.md) - Linux dump debugging docs
+- [Single file deployment and executable](../core/deploying/single-file.md) - Conceptual document for single file publish option
+- [The evolution of .NET Core to .NET 5](../core/dotnet-five.md) - Adding What is .NET 5 article
+
+## .NET for Apache Spark
+
+### Updated articles
+
+- [Tutorial: Get started with .NET for Apache Spark](../spark/tutorials/get-started.md) - Spark | Update getting started tutorial
+
+## .NET fundamentals
+
+### New articles
+
+- [Import code analysis rules](../fundamentals/code-analysis/quality-rules/index.md)
+- [Configuration files for code analysis rules](../fundamentals/code-analysis/configuration-files.md) - Add documentation for Global AnalyzerConfig
+- [Code style rule options](../fundamentals/code-analysis/code-style-rule-options.md) - Initial port of code style rule pages
+- [Formatting rules](../fundamentals/code-analysis/style-rules/formatting-rules.md) - Initial port of code style rule pages
+- [Code style rules](../fundamentals/code-analysis/style-rules/index.md) - Initial port of code style rule pages
+- [Language rules](../fundamentals/code-analysis/style-rules/language-rules.md) - Initial port of code style rule pages
+- [Naming rules](../fundamentals/code-analysis/style-rules/naming-rules.md) - Initial port of code style rule pages
+- [.NET documentation](../fundamentals/index.yml) - Fundamentals TOC
+
+## Architecture guides
+
+### Updated articles
+
+- [Develop ASP.NET Core MVC apps](../architecture/modern-web-apps-azure/develop-asp-net-core-mvc-apps.md) - Update Modern Web Apps eBook with Blazor WebAssembly Content
+
+## C# language
+
+### New articles
+
+- [What's new in C# 9.0](../csharp/whats-new/csharp-9.md) - Whats new in C# 9
+
+### Updated articles
+
+- [Named and Optional Arguments (C# Programming Guide)](../csharp/programming-guide/classes-and-structs/named-and-optional-arguments.md) - improve article quality
+
+## Visual Basic language
+
+### New articles
+
+- [Learn about any breaking changes in the Visual Basic compiler](../visual-basic/whats-new/breaking-changes.md) - Create breaking-changes for VB compiler
+
+## Community contributors
+
+The following people contributed to the .NET docs during this period. Thank you! Learn how to contribute by following the links under "Get involved" in the [what's new landing page](index.yml).
+
+- [NextTurn](https://github.com/NextTurn) - Next Turn (22)
+- [nschonni](https://github.com/nschonni) - Nick Schonning (22)
+- [Youssef1313](https://github.com/Youssef1313) - Youssef Victor (22)
+- [zakaria-c](https://github.com/zakaria-c) - Zakaria (11)
+- [pkulikov](https://github.com/pkulikov) - Petr Kulikov (7)
+- [JohyPark](https://github.com/JohyPark) - Joohyung Park (5)
+- [xTyler73](https://github.com/xTyler73) (5)
+- [bnewcomb](https://github.com/bnewcomb) - Ben Newcomb (2)
+- [Marusyk](https://github.com/Marusyk) - Roman Marusyk (2)
+- [mohsin-mehmood](https://github.com/mohsin-mehmood) - Mohsin Mehmood (2)
+- [Alexzander1990](https://github.com/Alexzander1990) (1)
+- [aymanizz](https://github.com/aymanizz) - Ayman Izzeldin (1)
+- [bklebe](https://github.com/bklebe) - Beatrix Klebe (1)
+- [bradriske](https://github.com/bradriske) (1)
+- [brendan-mcmahon](https://github.com/brendan-mcmahon) - Brendan McMahon (1)
+- [CAS0](https://github.com/CAS0) - Tony Caso (1)
+- [gurmeetsinghdke](https://github.com/gurmeetsinghdke) - Gurmeet Singh (1)
+- [hiMinju](https://github.com/hiMinju) - minju (1)
+- [iAliJ](https://github.com/iAliJ) - Ali (1)
+- [InstanceFactory](https://github.com/InstanceFactory) (1)
+- [jmia](https://github.com/jmia) - Jen Armstrong (1)
+- [kotx](https://github.com/kotx) - Kot (1)
+- [lbargaoanu](https://github.com/lbargaoanu) - Lucian Bargaoanu (1)
+- [martyncoup](https://github.com/martyncoup) - Martyn Coupland (1)
+- [mialkin](https://github.com/mialkin) - Aleksei Mialkin (1)
+- [MisterSadness](https://github.com/MisterSadness) - Piotr Lewandowski (1)
+- [mohsinnasir](https://github.com/mohsinnasir) - Mohsin Nasir (1)
+- [mr5z](https://github.com/mr5z) - mark (1)
+- [n1c](https://github.com/n1c) - Nic (1)
+- [Naine](https://github.com/Naine) - Nathan Williams (1)
+- [netchkin](https://github.com/netchkin) - Pavel Janečka (1)
+- [patgoull](https://github.com/patgoull) (1)
+- [perlun](https://github.com/perlun) - Per Lundberg (1)
+- [tama](https://github.com/tama) (1)
+- [ThomasArdal](https://github.com/ThomasArdal) - Thomas Ardal (1)
+- [worming004](https://github.com/worming004) - Worming (1)

docs/whats-new/index.yml

@@ -12,6 +12,8 @@ landingContent:
   linkLists:
   - linkListType: whats-new
     links:
+    - text: September 2020
+      url: 2020-09.md
     - text: August 2020
       url: 2020-08.md
     - text: July 2020
@@ -22,8 +24,6 @@ landingContent:
       url: dotnet-2020-05.md
     - text: April 2020
       url: dotnet-2020-04.md
-    - text: March 2020
-      url: dotnet-2020-03.md
 - title: Find language updates
   linkLists:
   - linkListType: whats-new

docs/whats-new/toc.yml

@@ -4,6 +4,8 @@ expanded: true
 items:
 - name: 2020
   items:
+  - name: September
+    href: 2020-09.md
   - name: August
     href: 2020-08.md
   - name: July
@@ -14,5 +16,3 @@ items:
     href: dotnet-2020-05.md
   - name: April
     href: dotnet-2020-04.md
-  - name: March
-    href: dotnet-2020-03.md