Add UnionBy documentation examples#12518
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snippets/csharp/System.Linq/Enumerable/AggregateTSource/enumerable.cs
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Summary
This PR adds two comprehensive code examples to the
Enumerable.UnionBydocumentation to illustrate its behavior and practical use cases.The added examples demonstrate:
UnionByKeySelectorExample: Merging two collections while excluding duplicates based on a specific property (e.g., merging inventory arrays byProductId).UnionByComparerExample: Merging two collections using a custom comparer to ignore case sensitivity when checking for duplicate keys (e.g., merging email lists).These examples have been added to the
<remarks>section inEnumerable.xmland the corresponding C# code has been added tosnippets/csharp/System.Linq/Enumerable/AggregateTSource/enumerable.cs.