--- title: You Don't Need AutoMapper (At Least 95% Of The Time) description: AutoMapper is a popular .NET library for object-to-object mapping, but it's frequently misused in ways that cause real problems. Four common antipatterns are... canonical: https://daily.dev/posts/you-don-t-need-automapper-at-least-95-of-the-time--2m091ukxe twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: You Don't Need AutoMapper (At Least 95% Of The Time) | daily.dev og:description: AutoMapper is a popular .NET library for object-to-object mapping, but it's frequently misused in ways that cause real problems. Four common antipatterns are... og:url: https://daily.dev/posts/you-don-t-need-automapper-at-least-95-of-the-time--2m091ukxe og:image: https://api.daily.dev/og/posts/2M091ukxE.png og:image:alt: You Don't Need AutoMapper (At Least 95% Of The Time) 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. # You Don't Need AutoMapper (At Least 95% Of The Time) **[We Are .NET](https://daily.dev/sources/wearedotnet)** · 20 min read · 12 upvotes · 0 comments ## Summary AutoMapper is a popular .NET library for object-to-object mapping, but it's frequently misused in ways that cause real problems. Four common antipatterns are examined: injecting external services into mapping profiles (causing hidden N+1 calls), embedding business logic inside profiles, mapping from multiple source objects via tuples (unclear API), and using the mapper to create domain objects from other domain objects (hiding critical business logic). The recommended alternative is simple static extension methods that are explicit, readable, dependency-free, and easy to navigate. AutoMapper still has valid use cases within its original design intent, but for 95% of typical mapping scenarios, plain static methods are preferable. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [AutoMapper vs Mapster vs Manual Mapping in .NET 10](https://daily.dev/posts/automapper-vs-mapster-vs-manual-mapping-in-net-10-rmbysux95) · Code with Mukesh · 16 upvotes · 3 comments --- Tags: [#.net](https://daily.dev/tags/.net), [#c#](https://daily.dev/tags/c#), [#design-patterns](https://daily.dev/tags/design-patterns) [View this post on daily.dev](https://daily.dev/posts/you-don-t-need-automapper-at-least-95-of-the-time--2m091ukxe) ```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":"You Don't Need AutoMapper (At Least 95% Of The Time)","url":"https://daily.dev/posts/you-don-t-need-automapper-at-least-95-of-the-time--2m091ukxe","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/you-don-t-need-automapper-at-least-95-of-the-time--2m091ukxe"},"datePublished":"2026-07-18T07:06:47.605Z","dateModified":"2026-07-18T22:21:11.762Z","description":"AutoMapper is a popular .NET library for object-to-object mapping, but it's frequently misused in ways that cause real problems. 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