.NET Blog
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Join the .NET & C# Teams at Microsoft Build 2025
The countdown to Microsoft Build 2025 is on! Join us May 19-22 either in-person in Seattle or online and explore an exciting lineup of .NET and C# content, incl...
Latest posts
Announcing release of ASP.NET and Web Tools 2013.1 for Visual Studio 2012
We have released ASP.NET and Web Tools 2013.1 for Visual Studio 2012. This release brings a ton of great improvements, and include some fantastic enhancements to ASP.NET MVC 5, Web API 2, Scaffolding and Entity Framework to users of Visual Studio 2012 and Visual Studio 2012 Express for Web. You can download and start using these features now. Below are details on a few of the great improvements you can take advantage of with this release. Please visit http://asp.net/aspnet/overview/aspnet-and-visual-studio-2012/aspnet-and-web-tools-20131-for-visual-studio-2012 for additional release notes, documentation, ...
RyuJIT .NET JIT compiler CTP1 FAQ
Update (2017): See .NET Framework Releases to learn about newer releases. This post shares more details about our new .NET 64-bit Just-In-Time (JIT) compiler. It was written by Kevin Frei, Development Lead for the CLR JIT team. RyuJIT received a great response with its RyuJIT: The next-generation JIT compiler for .NET announcement post. Thanks! It was great to see all of the questions. In this post, we’d like to answer your questions and give you a better sense of where RyuJIT is headed. RyuJIT generates code more quickly. How good is the generated code? At release, RyuJIT will be both much faster at generating ...
Starting Manage NuGet Packages for Solution dialog for projects under SourceGear Vault – issue and workaround
There has been reports that VS hangs when Manage NuGet Packages for Solution menu item is clicked. When VS responds again, it reports the following error: "Loading the projects is required to complete the requested action. If you click the Cancel button, project loading will continue in the background, and you can try to perform the action again later." When this happens, clicking Cancel button on the message dialog won't work and Visual Studio has to be manually closed. This issue may be related to the association of your project with SourceGear Vault, which puts the read-only attribute to the packages.config...
ASP.NET Performance: Performance Counters on Windows Client + IIS Express
Editor note: This blog is originally published by Christy Henriksson on 09-12-2012 in Web Performance Blog, which will be obsolete soon. Future ASP.NET related performance blogs will be posted here.I learned recently that ASP.NET performance counters are not available on Windows 7 or 8 (client) when running with IIS Express (or the Dev10 default of Cassini). Fortunately, the fix is easy: run Visual Studio as Administrator.If you’re using IIS Express without Visual Studio installed (for example, WebMatrix), then you’ll first need to install ASP.NET 4.5 features:dism /online /enable-feature ...
ASP.NET Performance: Debugging W3WP Startup
Editor note: This blog is originally published by Christy Henriksson on 03-19-2012 in Web Performance Blog, which will be obsolete soon. Future ASP.NET related performance blogs will be posted here.On a few occasions, I have needed to debug the startup of the IIS worker process (w3wp). I finally decided to create a script so that I no longer need to search for the answer. The script starts w3wp by requesting a non-existent ASPX page. After windbg is closed, the script will kill the debug session and clean up the registry.Script requirements: Debug Script:reg add "HKLMSoftwareMicrosoftWi...
ASP.NET Performance: Managed runtime loader
Editor note: This blog is originally published by Jose Reyes - ASP.NET on 02-29-2012 in Web Performance Blog, which will be obsolete soon. Future ASP.NET related performance blogs will be posted here. Introduction There is a file called aspnet.config in the .Net framework installation. This file is used to specify startup flags for both ASP.NET and CLR for those settings that are needed very early in the worker process lifetime, when the config system is not yet present. In IIS 7.5 we added an attribute to the <applicationPools> configuration collection called CLRConfigFile, on the applicationHost.co...
ASP.NET Performance: Prefetch and Multi-Core Jitting
Editor note: This blog is originally published by Jose Reyes - ASP.NET on 02-29-2012 in Web Performance Blog, which will be obsolete soon. Future ASP.NET related performance blogs will be posted here. Introduction. A couple of new features are introduced in ASP.NET 4.5 to improve startup time of web apps. Both features use a flag on the web.config to enable them. The features don’t do any magic by themself. They just enable features available on the operating system underneath or in the CLR APIs. Prefetch feature The prefetch feature only works on Windows 8 Server or newer OS. It requires the Os to be...
Azure Web Site now supports WebSockets
If you missed the announcement the other day, WebSockets are now supported in Windows Azure Web Sites. Let's try it with a sample SignalR application. Create an Azure Web Site Create a Visual Studio Project associated to an Azure Web Site Add SignalR Stock Ticker Sample Publish your local changes to Azure Web Site Enable WebSocket on Azure Web Site ...
PCL and .NET NuGet Libraries are now enabled for Xamarin
Earlier today, Soma announced a collaboration between Microsoft and Xamarin. As you probably know, Xamarin’s Visual Studio extension enables developers to use VS and .NET to extend the reach of their apps across multiple devices, including iOS and Android. As part of that collaboration, today, we are announcing two releases around the .NET portable class libraries (PCLs) that support this collaboration: Microsoft .NET NuGet Libraries Released Today we released the following portable libraries with our new license, on NuGet.org: You can now start using these libr...