--- title: The First C# 15 Feature Is Here | daily.dev description: Learn PostgreSQL for Free at Dometrain: https://dometrain.com/course/hands-on-learn-postgresql/?ref=nick-chapsas&promo=youtube Hello, everybody. I'm Nick, and... canonical: https://daily.dev/posts/the-first-c-15-feature-is-here-nxionawit twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: The First C# 15 Feature Is Here | daily.dev og:description: Learn PostgreSQL for Free at Dometrain: https://dometrain.com/course/hands-on-learn-postgresql/?ref=nick-chapsas&promo=youtube Hello, everybody. I'm Nick, and... og:url: https://daily.dev/posts/the-first-c-15-feature-is-here-nxionawit og:image: https://api.daily.dev/og/posts/nXioNAwit.png og:image:alt: The First C# 15 Feature Is Here 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 First C# 15 Feature Is Here **[Nick Chapsas](https://daily.dev/sources/nickchapsas)** · 6 min read · 0 upvotes · 0 comments ## Summary Learn PostgreSQL for Free at Dometrain: https://dometrain.com/course/hands-on-learn-postgresql/?ref=nick-chapsas&promo=youtube Hello, everybody. I'm Nick, and in this video, I will talk about a brand new feature coming in C# and .NET 11 called Collection Expression Arguments. Its syntax is a bit marmite, but I want to hear your thoughts. Don't forget to comment, like and subscribe :) Social Media: Follow me on GitHub: https://github.com/Elfocrash Follow me on Twitter: https://twitter.com/nickchapsas Connect on LinkedIn: https://www.linkedin.com/in/nick-chapsas #csharp #dotnet ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments - [CNCF Unveils Schedule for KubeCon \+ CloudNativeCon Europe 2026](https://daily.dev/posts/cncf-unveils-schedule-for-kubecon-cloudnativecon-europe-2026-ikhcoa5cb) · CNCF · 2 upvotes · 0 comments - [CNCF Debuts KubeCon \+ CloudNativeCon Japan 2026 Schedule](https://daily.dev/posts/cncf-debuts-kubecon-cloudnativecon-japan-2026-schedule-xp5pyudub) · CNCF · 1 upvotes · 0 comments --- Tags: [#.net](https://daily.dev/tags/.net), [#.net-core](https://daily.dev/tags/.net-core) [View this post on daily.dev](https://daily.dev/posts/the-first-c-15-feature-is-here-nxionawit) ```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":"The First C# 15 Feature Is Here","url":"https://daily.dev/posts/the-first-c-15-feature-is-here-nxionawit","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/the-first-c-15-feature-is-here-nxionawit"},"datePublished":"2026-01-27T12:04:41.183Z","dateModified":"2026-01-27T13:53:09.478Z","description":"Learn PostgreSQL for Free at Dometrain: https://dometrain.com/course/hands-on-learn-postgresql/?ref=nick-chapsas&promo=youtube\n\nHello, everybody. 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