---
title: "Discussion on \"Decompiling default interface methods: a method body inside an interface, the class that never overrode it, and the cast you cannot drop\" | Hashnode"
description: "Discussion on \"Decompiling default interface methods: a method body inside an interface, the class that never overrode it, and the cast you cannot drop\". For as long as there have been .NET decompilers, one rule held: interfaces declare signatures, classes supply bodies. A default interface method, introduced in C# 8 on .NET Core 3.0, breaks that rule"
url: "https://hashnode.com/posts/decompiling-default-interface-methods-a-method-body-inside-an-interface-the-class-that-never-overrod/6af32757f41938b63788ac9f"
---

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# [Decompiling default interface methods: a method body inside an interface, the class that never overrode it, and the cast you cannot drop](https://delta1labs.hashnode.dev/decompiling-default-interface-methods-a-method-body-inside-an-interface-the-class-that-never-overrod?utm_source=hashnode&utm_medium=feed)

For as long as there have been .NET decompilers, one rule held: interfaces declare signatures, classes supply bodies. A default interface method, introduced in C# 8 on .NET Core 3.0, breaks that rule

1d ago · 7 min read · delta1labs.hashnode.dev  
Updated 40m ago  
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