--- title: Microsoft .NET Framework 4 Platform Update 1 KB2478063... description: A sarcastic title mocks Microsoft's confusing naming for the .NET Framework 4 Platform Update 1, criticizing the practice of naming development framework... canonical: https://daily.dev/posts/microsoft-net-framework-4-platform-update-1-kb2478063-service-pack-5-feature-set-3-1-r2-november-ed-a2y4idwez twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Microsoft .NET Framework 4 Platform Update 1 KB2478063 Service Pack 5 Feature Set 3.1 R2 November Edition RTW | daily.dev og:description: A sarcastic title mocks Microsoft's confusing naming for the .NET Framework 4 Platform Update 1, criticizing the practice of naming development framework... og:url: https://daily.dev/posts/microsoft-net-framework-4-platform-update-1-kb2478063-service-pack-5-feature-set-3-1-r2-november-ed-a2y4idwez og:image: https://api.daily.dev/og/posts/a2y4iDwEz.png og:image:alt: Microsoft .NET Framework 4 Platform Update 1 KB2478063 Service Pack 5 Feature Set 3.1 R2 November Edition RTW 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. # Microsoft .NET Framework 4 Platform Update 1 KB2478063 Service Pack 5 Feature Set 3.1 R2 November Edition RTW **[Maarten Balliauw](https://daily.dev/sources/maartenballiauw)** · 2 min read · 0 upvotes · 0 comments ## Summary A sarcastic title mocks Microsoft's confusing naming for the .NET Framework 4 Platform Update 1, criticizing the practice of naming development framework updates with convoluted service-pack-style labels instead of simple major/minor version numbers like .NET 4.1. The author argues this confuses newcomers and makes it harder to justify upgrades to managers, comparing it unfavorably to Java's version sprawl. Several other bloggers, including Hadi Hariri and Scott Hanselman, are noted as sharing the same criticism, and it's revealed the update is actually .NET 4.0.1 under the hood. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is .NET Framework 4 Platform Update 1 actually called under the hood? It is actually .NET 4.0.1 under the hood, despite Microsoft marketing it with the more convoluted name Microsoft .NET Framework 4 Platform Update 1 KB2478063. Developers noted that NuGet references and package tooling identify it this way, which clarified the confusion around the awkward branding used for the update. _Developers tracking confusing .NET version naming can follow clarifications like this on daily.dev._ ## Similar posts on daily.dev - [.NET and .NET Framework September 2026 servicing releases updates](https://daily.dev/posts/net-and-net-framework-september-2026-servicing-releases-updates-tekcucbuk) · .NET Blog · 5 upvotes · 1 comments - [.NET and .NET Framework March 2026 servicing releases updates](https://daily.dev/posts/net-and-net-framework-march-2026-servicing-releases-updates-prjisr5bq) · DevBlogs · 0 upvotes · 0 comments - [Microsoft bumps .NET Framework 3.5 from Windows installers](https://daily.dev/posts/microsoft-bumps-net-framework-3-5-from-windows-installers-bdiqtowdd) · InfoWorld · 0 upvotes · 0 comments - [Microsoft rolls out Windows 11 26H1, but you can't have it](https://daily.dev/posts/microsoft-rolls-out-windows-11-26h1-but-you-can-t-have-it-bben4kym7) · The Register · 0 upvotes · 0 comments - [.NET and .NET Framework April 2026 servicing releases updates](https://daily.dev/posts/net-and-net-framework-april-2026-servicing-releases-updates-ll5eeuuem) · .NET Blog · 35 upvotes · 1 comments --- Tags: [#microsoft](https://daily.dev/tags/microsoft), [#.net](https://daily.dev/tags/.net) [View this post on daily.dev](https://daily.dev/posts/microsoft-net-framework-4-platform-update-1-kb2478063-service-pack-5-feature-set-3-1-r2-november-ed-a2y4idwez) ```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":"Microsoft .NET Framework 4 Platform Update 1 KB2478063 Service Pack 5 Feature Set 3.1 R2 November Edition RTW","url":"https://daily.dev/posts/microsoft-net-framework-4-platform-update-1-kb2478063-service-pack-5-feature-set-3-1-r2-november-ed-a2y4idwez","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/microsoft-net-framework-4-platform-update-1-kb2478063-service-pack-5-feature-set-3-1-r2-november-ed-a2y4idwez"},"datePublished":"2026-10-04T13:04:57.050Z","dateModified":"2026-10-04T13:08:29.475Z","description":"A sarcastic title mocks Microsoft's confusing naming for the .NET Framework 4 Platform Update 1, criticizing the practice of naming development framework...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/20e4896f72bc869fe4e22747036b0554?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/20e4896f72bc869fe4e22747036b0554?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Maarten Balliauw","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":"Maarten Balliauw","logo":"https://media.daily.dev/image/upload/s--rOTg3VYO--/f_auto,q_auto/v1791119043/logos/maartenballiauw?_a=BAMAMicg0","url":"https://daily.dev/sources/maartenballiauw"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/microsoft-net-framework-4-platform-update-1-kb2478063-service-pack-5-feature-set-3-1-r2-november-ed-a2y4idwez","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"microsoft,.net","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Maarten Balliauw","item":"https://daily.dev/sources/maartenballiauw"},{"@type":"ListItem","position":3,"name":"Microsoft .NET Framework 4 Platform Update 1 KB2478063 Service Pack 5 Feature Set 3.1 R2 November Edition RTW"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/microsoft-net-framework-4-platform-update-1-kb2478063-service-pack-5-feature-set-3-1-r2-november-ed-a2y4idwez#faq","mainEntity":[{"@type":"Question","name":"What is .NET Framework 4 Platform Update 1 actually called under the hood?","acceptedAnswer":{"@type":"Answer","text":"It is actually .NET 4.0.1 under the hood, despite Microsoft marketing it with the more convoluted name Microsoft .NET Framework 4 Platform Update 1 KB2478063. 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