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…able.cs Co-authored-by: Genevieve Warren <24882762+gewarren@users.noreply.github.com>
…able.cs Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
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This example should go in a folder named /System.Linq/Enumerable/CountBy.
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… add-countby-examples
…ies per maintainer request
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Summary
This PR adds a comprehensive code example to the
Enumerable.CountBydocumentation to illustrate its behavior and practical use case.The added example demonstrates:
The XML documentation has been updated in
Enumerable.xmlto include theSnippet209reference, and the corresponding C# code has been added tosnippets/csharp/System.Linq/Enumerable/AggregateTSource/enumerable.cs.