Revise AI prompt example (#50355)

* Revise date and enhance Copilot prompt example

Updated the date and modified the Copilot prompt example to include CSV-style input handling.

* Updates

* Refine Copilot prompt for CSV string parsing

Updated prompt to clarify parsing requirements for CSV-style data.

Author: anandmeg

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

@@ -1,7 +1,7 @@
 ---
 title: "Divide strings using String.Split"
 description: The Split method returns an array of strings split from a set of delimiters. It's an easy way to extract substrings from a string.
-ms.date: 02/18/2025
+ms.date: 12/05/2025
 helpviewer_keywords:
   - "splitting strings [C#]"
   - "Split method [C#]"
@@ -83,12 +83,16 @@ You can use AI tools, such as GitHub Copilot, to generate code to split strings
 The following text shows an example prompt for Copilot Chat:
 
 ```copilot-prompt
-Generate C# code to use Split.String to split a string into substrings.
-Input string is "You win some. You lose some." Delimiters are space and period.
-Provide example output.
+Generate C# code to parse and split CSV-style data from user input or external export that isn't well formed.
+The input string may contain mixed delimiters (commas, semicolons), inconsistent spacing and empty entries.
+Parse the string: accept all valid separators, remove any empty values and trim whitespace from all entries.
+Return a clean list of values.
+Show example output for the string: "  apples, oranges ; bananas, ,  ;pears".
 ```
 
-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).
+Review Copilot's suggestions before applying them.
+
+For more information, see [Copilot FAQs](https://aka.ms/copilot-general-use-faqs).
 
 ## See also
 

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

@@ -59,13 +59,15 @@ The following example calls the <xref:System.Convert.ToInt32%28System.String%29?
 
 You can use AI tools, such as GitHub Copilot, to generate C# code to convert a string to a number. You can customize the prompt to use a string per your requirements.
 
-The following text shows an example prompt for Copilot Chat:
+Here's an example Copilot Chat prompt:
 
 ```copilot-prompt
 Show me how to parse a string as a number, but don't throw an exception if the input string doesn't represent a number.
 ```
 
-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).
+Review Copilot's suggestions before applying them.
+
+For more information, see [Copilot FAQs](https://aka.ms/copilot-general-use-faqs).
 
 ## See also