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    Guided course · Coding and System-Design Practice in C#

    DSA Coding Patterns in C#: back to the course

    Module 3 · Searching and Trees · Lesson 9 of 17

    Binary Search in C#: Lower Bound, Array.BinarySearch, Rotated Arrays and Searching the Answer

    17 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 How to Solve and Check a Coding Problem in C#: Patterns, Tests and Measured Big-O.

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