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* Update ms.custom in how-to.md

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* Update how-to-convert-a-string-to-a-number.md

* Add Copilot highlight to how-to-initialize-a-dictionary-with-a-collection-initializer.md

* Update how-to-initialize-a-dictionary-with-a-collection-initializer.md

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

* Update docs/csharp/programming-guide/classes-and-structs/how-to-initialize-a-dictionary-with-a-collection-initializer.md

Co-authored-by: Bill Wagner <[email protected]>

---------

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

Author: 3 people

docs/csharp/how-to/concatenate-multiple-strings.md

@@ -1,18 +1,23 @@
 ---
 title: "How to concatenate multiple strings"
 description: There are multiple ways to concatenate strings in C#. Learn the options and the reasons behind different choices.
-ms.date: 11/22/2024
+ms.date: 1/31/2025
 helpviewer_keywords: 
   - "joining strings [C#]"
   - "concatenating strings [C#]"
   - "strings [C#], concatenation"
+ms.collection: ce-skilling-ai-copilot
+ms.custom: copilot-scenario-highlight
 ---
 # How to concatenate multiple strings (C# Guide)
 
 *Concatenation* is the process of appending one string to the end of another string. You concatenate strings by using the `+` operator. For string literals and string constants, concatenation occurs at compile time; no run-time concatenation occurs. For string variables, concatenation occurs only at run time.
 
 [!INCLUDE[interactive-note](~/includes/csharp-interactive-note.md)]
 
+> [!TIP]
+> You can use AI assistance to [concatenate strings with GitHub Copilot](#use-github-copilot-to-concatenate-strings).
+
 ## String literals
 
 The following example splits a long string literal into smaller strings to improve readability in the source code. The code concatenates the smaller strings to create the long string literal. The parts are concatenated into a single string at compile time. There's no run-time performance cost regardless of the number of strings involved.
@@ -66,6 +71,20 @@ combines an array of words, adding a space between each word in the array:
 
 This option can cause more allocations than other methods for concatenating collections, as it creates an intermediate string for each iteration. If optimizing performance is critical, consider the [`StringBuilder`](#stringbuilder) class or the [`String.Concat` or `String.Join`](#stringconcat-or-stringjoin) method to concatenate a collection, instead of `Enumerable.Aggregate`.
 
+## Use GitHub Copilot to concatenate strings
+
+You can use GitHub Copilot in your IDE to generate C# code to concatenate multiple strings. You can customize the prompt to specify strings and the method to use per your requirements.
+
+The following text shows an example prompt for Copilot Chat:
+
+```copilot-prompt
+Generate C# code to use String.Format to build an output string "Hi x, today's date is y. You are z years old." where x is "John",  y is today's date and z is the birthdate January 1, 2000. The final string should show date in the full format mm/dd/yyyy. Show output.
+```
+
+GitHub Copilot is powered by AI, so surprises and mistakes are possible. For more information, see [Copilot FAQs](https://aka.ms/copilot-general-use-faqs).
+
+Learn more about [GitHub Copilot in Visual Studio](/visualstudio/ide/visual-studio-github-copilot-install-and-states) and [GitHub Copilot in VS Code](https://code.visualstudio.com/docs/copilot/overview).
+
 ## See also
 
 - <xref:System.String>

docs/csharp/how-to/parse-strings-using-split.md

@@ -8,7 +8,7 @@ helpviewer_keywords:
   - "strings [C#], splitting"
   - "parse strings"
 ms.assetid: 729c2923-4169-41c6-9c90-ef176c1e2953
-ms.custom: mvc, vs-copilot-horizontal
+ms.custom: mvc, copilot-scenario-highlight
 ms.collection: ce-skilling-ai-copilot
 ---
 # How to separate strings using String.Split in C\#

docs/csharp/programming-guide/classes-and-structs/how-to-initialize-a-dictionary-with-a-collection-initializer.md

@@ -1,10 +1,12 @@
 ---
 title: "How to initialize a dictionary with a collection initializer"
 description: Learn how to initialize a dictionary in C#, using either the Add method or an index initializer. This example shows both options.
-ms.date: 03/15/2024
+ms.date: 01/31/2025
 helpviewer_keywords: 
   - "collection initializers [C#], with Dictionary"
 ms.topic: how-to
+ms.collection: ce-skilling-ai-copilot
+ms.custom: copilot-scenario-highlight
 ms.assetid: 25283922-f8ee-40dc-a639-fac30804ec71
 ---
 # How to initialize a dictionary with a collection initializer (C# Programming Guide)
@@ -22,6 +24,9 @@ A <xref:System.Collections.Generic.Dictionary%602> contains a collection of key/
 > <xref:System.Collections.Generic.Dictionary%602.Add%2A> method will throw <xref:System.ArgumentException>: `'An item with the same key has already been added. Key: 111'`,
 > while the second part of example, the public read / write indexer method, will quietly overwrite the already existing entry with the same key.
 
+> [!TIP]
+> You can use AI assistance to [initialize a dictionary with GitHub Copilot](#use-github-copilot-to-initialize-a-dictionary).
+
 ## Example
 
 In the following code example, a <xref:System.Collections.Generic.Dictionary%602> is initialized with instances of type `StudentName`. The first initialization uses the `Add` method with two arguments. The compiler generates a call to `Add` for each of the pairs of `int` keys and `StudentName` values. The second uses a public read / write indexer method of the `Dictionary` class:
@@ -30,6 +35,20 @@ In the following code example, a <xref:System.Collections.Generic.Dictionary%602
 
 Note the two pairs of braces in each element of the collection in the first declaration. The innermost braces enclose the object initializer for the `StudentName`, and the outermost braces enclose the initializer for the key/value pair to be added to the `students` <xref:System.Collections.Generic.Dictionary%602>. Finally, the whole collection initializer for the dictionary is enclosed in braces. In the second initialization, the left side of the assignment is the key and the right side is the value, using an object initializer for `StudentName`.
 
+## Use GitHub Copilot to initialize a dictionary
+
+You can use GitHub Copilot in your IDE to generate C# code to initialize a dictionary with a collection initializer. You can customize the prompt to add specifics per your requirements.
+
+The following text shows an example prompt for Copilot Chat:
+
+```copilot-prompt
+Generate C# code to initialize Dictionary<int, Employee> using key-value pairs within the collection initializer. The employee class is a record class with two properties: Name and Age.
+```
+
+GitHub Copilot is powered by AI, so surprises and mistakes are possible. For more information, see [Copilot FAQs](https://aka.ms/copilot-general-use-faqs).
+
+Learn more about [GitHub Copilot in Visual Studio](/visualstudio/ide/visual-studio-github-copilot-install-and-states) and [GitHub Copilot in VS Code](https://code.visualstudio.com/docs/copilot/overview).
+
 ## See also
 
 - [Object and Collection Initializers](./object-and-collection-initializers.md)

docs/csharp/programming-guide/types/how-to-convert-a-string-to-a-number.md

@@ -9,7 +9,7 @@ helpviewer_keywords:
   - "strings [C#], converting to int"
 ms.topic: how-to
 ms.collection: ce-skilling-ai-copilot
-ms.custom: vs-copilot-horizontal
+ms.custom: copilot-scenario-highlight
 ms.assetid: 467b9979-86ee-4afd-b734-30299cda91e3
 adobe-target: true
 ---

docs/standard/serialization/system-text-json/customize-properties.md

@@ -13,7 +13,7 @@ helpviewer_keywords:
   - "objects, serializing"
 ms.topic: how-to
 ms.collection: ce-skilling-ai-copilot
-ms.custom: vs-copilot-horizontal
+ms.custom: copilot-scenario-highlight
 ---
 
 # How to customize property names and values with System.Text.Json

docs/standard/serialization/system-text-json/deserialization.md

@@ -12,7 +12,7 @@ helpviewer_keywords:
   - "deserialization"
 ms.topic: concept-article
 ms.collection: ce-skilling-ai-copilot
-ms.custom: vs-copilot-horizontal
+ms.custom: copilot-scenario-highlight
 #customer intent: As a developer, I want to learn how to use System.Text.Json to deserialize JSON data.
 ---
 

docs/standard/serialization/system-text-json/how-to.md

@@ -13,7 +13,7 @@ helpviewer_keywords:
   - "objects, serializing"
 ms.topic: how-to
 ms.collection: ce-skilling-ai-copilot
-ms.custom: vs-copilot-horizontal
+ms.custom: copilot-scenario-highlight
 adobe-target: true
 ---
 

docs/standard/serialization/system-text-json/migrate-from-newtonsoft.md

@@ -11,7 +11,7 @@ helpviewer_keywords:
 ms.topic: how-to
 zone_pivot_groups: dotnet-version
 ms.collection: ce-skilling-ai-copilot
-ms.custom: vs-copilot-horizontal
+ms.custom: copilot-scenario-highlight
 ---
 
 # Migrate from Newtonsoft.Json to System.Text.Json