--- title: Interfaces vs Abstract Classes | daily.dev description: A popular C# interview question is to explain the differences between interfaces and abstract classes, why use an interface over an abstract class or an... canonical: https://daily.dev/posts/interfaces-vs-abstract-classes-jaqd9fvyp twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Interfaces vs Abstract Classes | daily.dev og:description: A popular C# interview question is to explain the differences between interfaces and abstract classes, why use an interface over an abstract class or an... og:url: https://daily.dev/posts/interfaces-vs-abstract-classes-jaqd9fvyp og:image: https://api.daily.dev/og/posts/JAqd9FVyP.png og:image:alt: Interfaces vs Abstract Classes og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Interfaces vs Abstract Classes **[Discover .NET](https://daily.dev/sources/discdot)** · 43 upvotes · 0 comments ## Summary A popular C# interview question is to explain the differences between interfaces and abstract classes, why use an interface over an abstract class or an abstract class over the interface. Support my Work 🤝 https://www.patreon.com/raw_coding Buy my Courses 📚 https://learning.raw-coding.dev Buy my Merch 🛒 https://shop.raw-coding.dev Join the Community 💬 https://discord.gg/Qp6hdq3 Tweet Tweet 📣 https://twitter.com/anton_t0shik Tune in LIVE! 🎥 https://www.twitch.tv/raw_coding #csharp #dotnet #interview ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#c](https://daily.dev/tags/c), [#interview](https://daily.dev/tags/interview), [#.net](https://daily.dev/tags/.net), [#c#](https://daily.dev/tags/c#) [View this post on daily.dev](https://daily.dev/posts/interfaces-vs-abstract-classes-jaqd9fvyp) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Interfaces vs Abstract Classes","url":"https://daily.dev/posts/interfaces-vs-abstract-classes-jaqd9fvyp","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/interfaces-vs-abstract-classes-jaqd9fvyp"},"datePublished":"2023-10-25T12:28:22.685Z","dateModified":"2023-10-25T12:28:20.885Z","description":"A popular C# interview question is to explain the differences between interfaces and abstract classes, why use an interface over an abstract class or an...","image":"https://i.ytimg.com/vi/PPZ_vZcF2AU/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/PPZ_vZcF2AU/sddefault.jpg","isAccessibleForFree":true,"articleSection":"Discover .NET","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Discover .NET","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/ffa4f4ad5e0b4f9096da7a3943bd5ff2","url":"https://daily.dev/sources/discdot"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/interfaces-vs-abstract-classes-jaqd9fvyp","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":43},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"c,interview,.net,c#"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Discover .NET","item":"https://daily.dev/sources/discdot"},{"@type":"ListItem","position":3,"name":"Interfaces vs Abstract Classes"}]} ```