Remove "What's new in C# 10" (#43694)

* Remove "What's new in C# 10"

Remove references to "Beginning in C# 10", and the "What's new in C# 10" article.

* fix warnings and add the redirections

* Move interpolated string handler tutorial

This was a new feature in C# 10. Move this to the advanced / performance section.

* move what's new pattern tutorial

Perform edit pass fix open issues.

* Final edit pass

Fix bugs on edited articles, run an edit pass

* fix tutorial link

* Update toc.yml

* Apply suggestions from code review

Co-authored-by: Genevieve Warren <[email protected]>

---------

Co-authored-by: Genevieve Warren <[email protected]>

Author: BillWagner

.openpublishing.redirection.csharp.json

@@ -4174,7 +4174,7 @@
         },
         {
             "source_path_from_root": "/docs/csharp/tutorials/exploration/patterns-objects.md",
-            "redirect_url": "/dotnet/csharp/whats-new/tutorials/patterns-objects"
+            "redirect_url": "/dotnet/csharp/tutorials/patterns-objects"
         },
         {
             "source_path_from_root": "/docs/csharp/tutorials/exploration/records.md",
@@ -4297,13 +4297,17 @@
             "source_path_from_root": "/docs/csharp/whats-new/csharp-7.md",
             "redirect_url": "/dotnet/csharp/whats-new/csharp-version-history#c-version-70"
         },
+        {
+            "source_path_from_root": "/docs/csharp/whats-new/csharp-8.md",
+            "redirect_url": "/dotnet/csharp/whats-new/csharp-version-history#c-version-80"
+        },
         {
             "source_path_from_root": "/docs/csharp/whats-new/csharp-9.md",
             "redirect_url": "/dotnet/csharp/whats-new/csharp-version-history#c-version-9"
         },
         {
-            "source_path_from_root": "/docs/csharp/whats-new/csharp-8.md",
-            "redirect_url": "/dotnet/csharp/whats-new/csharp-version-history#c-version-80"
+            "source_path_from_root": "/docs/csharp/whats-new/csharp-10.md",
+            "redirect_url": "/dotnet/csharp/whats-new/csharp-version-history#c-version-10"
         },
         {
             "source_path_from_root": "/docs/csharp/whats-new/index.md",
@@ -4334,6 +4338,14 @@
             "source_path_from_root": "/docs/csharp/whats-new/tutorials/ranges-indexes.md",
             "redirect_url": "/dotnet/csharp/tutorials/ranges-indexes"
         },
+        {
+            "source_path_from_root": "/docs/csharp/whats-new/tutorials/interpolated-string-handler.md",
+            "redirect_url": "/dotnet/csharp/advanced-topics/performance/interpolated-string-handler"
+        },
+        {
+            "source_path_from_root": "/docs/csharp/whats-new/tutorials/patterns-objects.md",
+            "redirect_url": "/dotnet/csharp/tutorials/patterns-objects"
+        },
         {
             "source_path_from_root": "/docs/csharp/write-safe-efficient-code.md",
             "redirect_url": "/dotnet/csharp/advanced-topics/performance"

docs/core/tutorials/top-level-templates.md

@@ -1,7 +1,7 @@
 ---
 title: "C# console app template changes in .NET 6+"
 description: The .NET 6+ project template for C# console apps uses top-level statements. Understand what changed and how to use existing learning materials with the new syntax.
-ms.date: 03/15/2024
+ms.date: 11/22/2024
 ---
 # C# console app template generates top-level statements
 
@@ -34,7 +34,7 @@ namespace MyApp
 
 In the preceding code, the actual namespace depends on the project name.
 
-These two forms represent the same program. Both are valid with C# 10.0. When you use the newer version, you only need to write the body of the `Main` method. The compiler generates a `Program` class with an entry point method and places all your top level statements in that method. The name of the generated method isn't `Main`, it's an implementation detail that your code can't reference directly. You don't need to include the other program elements, the compiler generates them for you. You can learn more about the code the compiler generates when you use top level statements in the article on [top level statements](../../csharp/fundamentals/program-structure/top-level-statements.md) in the C# Guide's fundamentals section.
+These two forms represent the same program. Both are valid in C#. When you use the newer version, you only need to write the body of the `Main` method. The compiler generates a `Program` class with an entry point method and places all your top level statements in that method. The name of the generated method isn't `Main`, it's an implementation detail that your code can't reference directly. You don't need to include the other program elements, the compiler generates them for you. You can learn more about the code the compiler generates when you use top level statements in the article on [top level statements](../../csharp/fundamentals/program-structure/top-level-statements.md) in the C# Guide's fundamentals section.
 
 You have two options to work with tutorials that aren't updated to use .NET 6+ templates:
 

docs/core/tutorials/with-visual-studio-code.md

@@ -1,7 +1,7 @@
 ---
 title: Create a .NET console application using Visual Studio Code
 description: Learn how to create a .NET console application using Visual Studio Code.
-ms.date: 09/12/2024
+ms.date: 11/22/2024
 zone_pivot_groups: dotnet-version
 ---
 # Tutorial: Create a .NET console application using Visual Studio Code
@@ -168,7 +168,7 @@ Create a .NET console app project named "HelloWorld".
 
    The code defines a class, `Program`, with a single method, `Main`, that takes a <xref:System.String> array as an argument. `Main` is the application entry point, the method that's called automatically by the runtime when it launches the application. Any command-line arguments supplied when the application is launched are available in the *args* array.
 
-   In the latest version of C#, a new feature named [top-level statements](../../csharp/fundamentals/program-structure/top-level-statements.md) lets you omit the `Program` class and the `Main` method. Most existing C# programs don't use top-level statements, so this tutorial doesn't use this new feature. But it's available in C# 10, and whether you use it in your programs is a matter of style preference.
+   In the latest version of C#, a new feature named [top-level statements](../../csharp/fundamentals/program-structure/top-level-statements.md) lets you omit the `Program` class and the `Main` method. Most existing C# programs don't use top-level statements, so this tutorial doesn't use this new feature. But it's the current default for new C# programs. Whether you use it in your programs is a matter of style preference.
 
 ## Run the app
 

docs/core/tutorials/with-visual-studio.md

@@ -1,7 +1,7 @@
 ---
 title: Create a .NET console application using Visual Studio
 description: Learn how to create a .NET console application with C# or Visual Basic using Visual Studio.
-ms.date: 03/21/2024
+ms.date: 11/22/2024
 zone_pivot_groups: dotnet-version
 dev_langs:
   - "csharp"
@@ -186,7 +186,7 @@ Create a .NET console app project named "HelloWorld".
 
    The code defines a class, `Program`, with a single method, `Main`, that takes a <xref:System.String> array as an argument. `Main` is the application entry point, the method that's called automatically by the runtime when it launches the application. Any command-line arguments supplied when the application is launched are available in the *args* array.
 
-   In the latest version of C#, a new feature named [top-level statements](../../csharp/fundamentals/program-structure/top-level-statements.md) lets you omit the `Program` class and the `Main` method. Most existing C# programs don't use top-level statements, so this tutorial doesn't use this new feature. But it's available in C# 10, and whether you use it in your programs is a matter of style preference.
+   In the latest version of C#, a new feature named [top-level statements](../../csharp/fundamentals/program-structure/top-level-statements.md) lets you omit the `Program` class and the `Main` method. Most existing C# programs don't use top-level statements, so this tutorial doesn't use this new feature. But it's the current default for new C# programs. Whether you use it in your programs is a matter of style preference.
 
 ## Run the app
 
@@ -306,7 +306,7 @@ Create a .NET console app project named "HelloWorld".
 
    The code defines a class, `Program`, with a single method, `Main`, that takes a <xref:System.String> array as an argument. `Main` is the application entry point, the method that's called automatically by the runtime when it launches the application. Any command-line arguments supplied when the application is launched are available in the *args* array.
 
-   In the latest version of C#, a new feature named [top-level statements](../../csharp/fundamentals/program-structure/top-level-statements.md) lets you omit the `Program` class and the `Main` method. Most existing C# programs don't use top-level statements, so this tutorial doesn't use this new feature. But it's available in C# 10, and whether you use it in your programs is a matter of style preference.
+   In the latest version of C#, a new feature named [top-level statements](../../csharp/fundamentals/program-structure/top-level-statements.md) lets you omit the `Program` class and the `Main` method. Most existing C# programs don't use top-level statements, so this tutorial doesn't use this new feature. But it's the current default for new C# programs. Whether you use it in your programs is a matter of style preference.
 
 ## Run the app
 

docs/core/whats-new/dotnet-6.md

@@ -10,7 +10,7 @@ author: gewarren
 
 .NET 6 delivers the final parts of the .NET unification plan that started with [.NET 5](dotnet-5.md). .NET 6 unifies the SDK, base libraries, and runtime across mobile, desktop, IoT, and cloud apps. In addition to this unification, the .NET 6 ecosystem offers:
 
-- **Simplified development**: Getting started is easy. New language features in [C# 10](../../csharp/whats-new/csharp-10.md) reduce the amount of code you need to write. And investments in the web stack and minimal APIs make it easy to quickly write smaller, faster microservices.
+- **Simplified development**: Getting started is easy. New language features in [C# 10](../../csharp/whats-new/csharp-version-history.md#c-version-10) reduce the amount of code you need to write. And investments in the web stack and minimal APIs make it easy to quickly write smaller, faster microservices.
 
 - **Better performance**: .NET 6 is the fastest full stack web framework, which lowers compute costs if you're running in the cloud.
 
@@ -54,7 +54,7 @@ The .NET 6 release includes support for macOS Arm64 (or "Apple Silicon") and Win
 
 ## C# 10 and templates
 
-C# 10 includes innovations such as `global using` directives, file-scoped namespace declarations, and record structs. For more information, see [What's new in C# 10](../../csharp/whats-new/csharp-10.md).
+C# 10 includes innovations such as `global using` directives, file-scoped namespace declarations, and record structs. For more information, see [C# Language version history](../../csharp/whats-new/csharp-version-history.md#c-version-10).
 
 In concert with that work, the .NET SDK project templates for C# have been modernized to use some of the new language features:
 
@@ -273,7 +273,6 @@ The new <xref:System.Collections.Generic.PriorityQueue%602> class represents a c
 
 ## See also
 
-- [What's new in C# 10](../../csharp/whats-new/csharp-10.md)
 - [What's new in F# 6](../../fsharp/whats-new/fsharp-6.md)
 - [What's new in EF Core 6](/ef/core/what-is-new/ef-core-6.0/whatsnew)
 - [What's new in ASP.NET Core 6](/aspnet/core/release-notes/aspnetcore-6.0)