--- title: The best new features of C# 14 | daily.dev description: C# 14, shipping with .NET 10, introduces several notable features. File-based apps let you run a single .cs file directly from the command line without a... canonical: https://daily.dev/posts/hax9jouh4 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: The best new features of C# 14 | daily.dev og:description: C# 14, shipping with .NET 10, introduces several notable features. File-based apps let you run a single .cs file directly from the command line without a... og:url: https://daily.dev/posts/hax9jouh4 og:image: https://api.daily.dev/og/posts/HAX9JOuH4.png og:image:alt: Post cover image 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. # The best new features of C# 14 **[John Lowie](https://daily.dev/sources/t9yey2xliaywzjkmyuv7g)** · [@johnlowiework](https://daily.dev/johnlowiework) · 13 upvotes · 0 comments ## Summary C# 14, shipping with .NET 10, introduces several notable features. File-based apps let you run a single .cs file directly from the command line without a project or solution file. Extension members add a new block syntax for declaring both extension methods and extension properties, allowing cleaner grouping by receiver. The nameof operator now supports unbound generic types like List<> and Dictionary<,>, eliminating the need for dummy type arguments. User-defined compound assignment operators (+=, -=, *=, etc.) can now be overloaded directly on custom types, enabling cleaner, more readable code. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Extension Properties: C\# 14’s Game-Changer for Cleaner Code](https://daily.dev/posts/extension-properties-c-14-s-game-changer-for-cleaner-code-aawdgf4pc) · Telerik · 0 upvotes · 0 comments - [C\# Extension Members](https://daily.dev/posts/c-extension-members-1anekbztp) · JetBrains · 18 upvotes · 1 comments - [Exploring C\# File-based Apps in .NET 10](https://daily.dev/posts/exploring-c-file-based-apps-in-net-10-yepr485nu) · Milan Jovanović · 12 upvotes · 1 comments --- Tags: [#.net](https://daily.dev/tags/.net), [#c#](https://daily.dev/tags/c#) [View this post on daily.dev](https://daily.dev/posts/hax9jouh4) ```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":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/hax9jouh4","headline":"The best new features of C# 14","text":"Shared: The best new features of C# 14","url":"https://daily.dev/posts/hax9jouh4","datePublished":"2026-02-27T14:11:09.296Z","dateModified":"2026-02-27T14:11:09.300Z","author":{"@type":"Person","name":"John Lowie","url":"https://daily.dev/johnlowiework","image":"https://media.daily.dev/image/upload/s--lzpsRa9H--/f_auto/v1769503171/avatars/avatar_t9yEy2xLiAYWZjkmyUV7G?_a=BAMAMiiu0","description":"Software Engineer | AI SaaS Developer","interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"EndorseAction"},"userInteractionCount":3070}},"image":"https://media.daily.dev/image/upload/s--OHB84bZF--/f_auto/v1722860399/public/Placeholder%2010","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":13},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"sharedContent":{"@type":"WebPage","url":"https://api.daily.dev/r/6gSbBjwv4"},"isPartOf":{"@type":"WebPage","url":"https://daily.dev/sources/t9yey2xliaywzjkmyuv7g","name":"John Lowie"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"John Lowie","item":"https://daily.dev/sources/t9yey2xliaywzjkmyuv7g"},{"@type":"ListItem","position":3,"name":"The best new features of C# 14"}]} ```