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    Guided course · Architecture and Design in .NET

    Design Patterns in C#: The .NET Interview Guide: back to the course

    Module 5 · Behavioral Patterns: Communication and Pipelines · Lesson 17 of 20

    Visitor and Pattern Matching in C#: Double Dispatch, Expression Trees, ExpressionVisitor and Switch Expressions

    18 min readTechInterviewNotes Editorial TeamUpdated 14 Oct 2026Save

    This lesson comes with Full Access

    Its text, video and cheat sheet open with Full Access. This course's free lessons open without an account. Start with Design Patterns in .NET Interviews: What They Are, the Patterns You Already Use, and How to Choose One.

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    Practice

    Practice test: Design Patterns in C#: Observer, Mediator, Chain of Responsibility and Visitor — Lesson Practice8 questions · 15 minutes · 1 mark each, no negative marking
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