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    Guided course · C# Language

    Time and Space Complexity in LINQ: back to the course

    Module 4 · Element Operators and Fast Paths · Lesson 8 of 18

    Contains, Any and Count: Fast Paths on List, HashSet and IEnumerable

    13 min readTechInterviewNotes Editorial TeamUpdated 13 Oct 2026Save

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    Its text, video and cheat sheet open with Full Access. This course's free lessons open without an account. Start with Big-O for .NET Developers: Time and Space in LINQ.

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