---
title: "Discussion on \"SOLID Principles Simplified #3: Liskov Substitution Principle (LSP)\" | Hashnode"
description: "Discussion on \"SOLID Principles Simplified #3: Liskov Substitution Principle (LSP)\". If B is a subtype of A, objects of B should be usable wherever objects of A are expected."
url: "https://hashnode.com/posts/solid-principles-simplified-3-liskov-substitution-principle-lsp/6a8985bc4d624f9b68fbc191"
---

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# [SOLID Principles Simplified #3: Liskov Substitution Principle (LSP)](https://onkeshgupta.hashnode.dev/solid-principles-simplified-3-liskov-substitution-principle-lsp?utm_source=hashnode&utm_medium=feed)

If B is a subtype of A, objects of B should be usable wherever objects of A are expected.

Aug 22 · 6 min read · onkeshgupta.hashnode.dev  
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## Written by

[Onkesh Gupta](https://hashnode.com/@onkeshgupta)

@onkeshgupta · Delhi, India

  
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