--- title: Microsoft PDC09 day 2 keynote highlights | daily.dev description: Day two of Microsoft PDC09 brought several announcements: Silverlight 4 entered beta with a long list of new features including webcam access, multicast... canonical: https://daily.dev/posts/microsoft-pdc09-day-2-keynote-highlights-lu0gfp1oy twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Microsoft PDC09 day 2 keynote highlights | daily.dev og:description: Day two of Microsoft PDC09 brought several announcements: Silverlight 4 entered beta with a long list of new features including webcam access, multicast... og:url: https://daily.dev/posts/microsoft-pdc09-day-2-keynote-highlights-lu0gfp1oy og:image: https://api.daily.dev/og/posts/Lu0GFP1oy.png og:image:alt: Microsoft PDC09 day 2 keynote highlights 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 PDC09 day 2 keynote highlights **[Maarten Balliauw](https://daily.dev/sources/maartenballiauw)** · 2 min read · 0 upvotes · 0 comments ## Summary Day two of Microsoft PDC09 brought several announcements: Silverlight 4 entered beta with a long list of new features including webcam access, multicast streaming, offline DRM, printing, clipboard support, out-of-browser support, drag and drop, implicit styling, an HTML control, rich-text editing, and REST/TCP enhancements. Internet Explorer 9 was unveiled, featuring faster JavaScript execution, improved ACID3 compliance, and Direct3D-based graphics rendering. WCF RIA Services was also introduced as a renamed, WCF-based evolution of RIA Services, replacing its previous standalone transport layer. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What new features were added in the Silverlight 4 beta announced at PDC09? Silverlight 4 beta added webcam access, multicast streaming, offline DRM and output protection, printing, clipboard support, out-of-browser and out-of-sandbox support, drag and drop, implicit styling, an HTML control, rich-text editing, the ability to share assemblies with .NET 4, data binding improvements, UDP multicast, REST enhancements, and TCP channel support. _Teams planning a Silverlight 4 upgrade can track feature changes like these on daily.dev._ ### What changed with WCF RIA Services compared to earlier RIA Services versions? WCF RIA Services is essentially a renamed version of RIA Services that now runs on top of WCF instead of using its own custom transport layer implementation from previous versions, announced in beta alongside other PDC09 Microsoft technology updates. _Developers tracking RIA Services' shift to WCF can follow ecosystem changes like this on daily.dev._ ### What improvements did Internet Explorer 9 preview at PDC09 bring to JavaScript and graphics performance? Internet Explorer 9, previewed at PDC09, ran JavaScript significantly faster, passed more of the ACID3 test (though not all of it), and introduced Direct3D rendering for graphic content, making page rendering noticeably faster and smoother in the live demo. _Web developers evaluating browser rendering changes can follow IE9-era updates on daily.dev._ ## Similar posts on daily.dev - [Microsoft Releases .NET 11 Preview 6 With Language and Framework Updates](https://daily.dev/posts/microsoft-releases-net-11-preview-6-with-language-and-framework-updates-oqwjdzv3l) · InfoQ · 6 upvotes · 0 comments - [.NET train keeps rolling with first showing of 2026 release](https://daily.dev/posts/net-train-keeps-rolling-with-first-showing-of-2026-release-i497xhbps) · DEVCLASS · 17 upvotes · 0 comments - [Microsoft unveils first preview of .NET 11](https://daily.dev/posts/microsoft-unveils-first-preview-of-net-11-4y7l7j8r0) · InfoWorld · 24 upvotes · 1 comments --- Tags: [#webdev](https://daily.dev/tags/webdev), [#microsoft](https://daily.dev/tags/microsoft), [#.net](https://daily.dev/tags/.net), [#microsoft-edge](https://daily.dev/tags/microsoft-edge) [View this post on daily.dev](https://daily.dev/posts/microsoft-pdc09-day-2-keynote-highlights-lu0gfp1oy) ```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 PDC09 day 2 keynote highlights","url":"https://daily.dev/posts/microsoft-pdc09-day-2-keynote-highlights-lu0gfp1oy","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/microsoft-pdc09-day-2-keynote-highlights-lu0gfp1oy"},"datePublished":"2026-10-04T13:04:26.074Z","dateModified":"2026-10-04T13:05:41.899Z","description":"Day two of Microsoft PDC09 brought several announcements: Silverlight 4 entered beta with a long list of new features including webcam access, multicast...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/bfefc675c25c5f4ef18e7940025a5445?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/bfefc675c25c5f4ef18e7940025a5445?_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-pdc09-day-2-keynote-highlights-lu0gfp1oy","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"webdev,microsoft,.net,microsoft-edge","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 PDC09 day 2 keynote highlights"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/microsoft-pdc09-day-2-keynote-highlights-lu0gfp1oy#faq","mainEntity":[{"@type":"Question","name":"What new features were added in the Silverlight 4 beta announced at PDC09?","acceptedAnswer":{"@type":"Answer","text":"Silverlight 4 beta added webcam access, multicast streaming, offline DRM and output protection, printing, clipboard support, out-of-browser and out-of-sandbox support, drag and drop, implicit styling, an HTML control, rich-text editing, the ability to share assemblies with .NET 4, data binding improvements, UDP multicast, REST enhancements, and TCP channel support. 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