The snippet library.

C#LINQ transformations

Calculate a product with Aggregate ↗

C#: Supply a seed to define the result for an empty sequence.

C#✓ Tested

C#LINQ transformations

Create a reusable one-to-many lookup ↗

C#: ToLookup groups values by key and returns an empty sequence for an unknown key.

C#✓ Tested

C#LINQ transformations

Find a matching item with a fallback ↗

C#: Use the FirstOrDefault overload with an explicit default value.

C#✓ Tested

C#LINQ transformations

Flatten nested collections with SelectMany ↗

C#: Concatenate the items from several sequences into one sequence.

C#✓ Tested

C#LINQ transformations

Pair corresponding collection elements ↗

C#: Zip stops at the shorter sequence, so validate lengths separately if mismatches are an error.

C#✓ Tested

C#LINQ transformations

Remove duplicate records by a selected key ↗

C#: DistinctBy keeps the first record for each key in encounter order.

C#✓ Tested

C#LINQ transformations

Split values into fixed-size chunks ↗

C#: Enumerable.Chunk creates arrays and allows a shorter final chunk.

C#✓ Tested

C#LINQ transformations

Take a page from an ordered sequence ↗

C#: Apply a stable order before Skip and Take for predictable paging.

C#✓ Tested

C#LINQ transformations

Test whether any or all values match ↗

C#: Any and All short-circuit instead of materializing filtered collections.

C#✓ Tested

C#LINQ transformations

Transform each item with Select ↗

C#: Project each input value into a new value without modifying the source array.

C#✓ Tested