https://devblogs.microsoft.com/dotnet/announcing-builtin-container-support-for-the-dotnet-sdk/ Skip to main content [RE1Mu3b] Microsoft .NET Blog .NET Blog .NET Blog * Home * DevBlogs * Developer + Visual Studio + Visual Studio Code + Visual Studio for Mac + DevOps + Developer support + CSE Developer + Engineering@Microsoft + Azure SDK + IoT + Command Line + Perf and Diagnostics + Dr. International + Notification Hubs + Math in Office * Technology + DirectX + PIX + SurfaceDuo + Startups + Sustainable Engineering + Windows AI Platform * Languages + C++ + C# + F# + Visual Basic + TypeScript + PowerShell Community + PowerShell Team + Python + Q# + JavaScript + Java + Java Blog in Chinese * .NET + .NET + .NET MAUI + Blazor + ASP.NET + NuGet + Xamarin * Platform Development + #ifdef Windows + Apps for Windows + Azure Depth Platform + Azure Government + Bing Dev Center + Microsoft Edge Dev + Microsoft Azure + Microsoft 365 Developer + Old New Thing + Windows MIDI and Music dev + Windows Search Platform * Data Development + Azure Cosmos DB + Azure Data Studio + Azure SQL Database + OData + Revolutions R + SQL Server Data Tools * More [ ] Search Search Cancel Announcing built-in container support for the .NET SDK [png] Chet Husk August 25th, 202221 6 Containers have become one of the easiest ways to distribute and run a wide suite of applications and services in the cloud. The .NET Runtime was hardened for containers years ago. You can now create containerized versions of your applications with just dotnet publish. Container images are now a supported output type of the .NET SDK. TL;DR Before we go into the details of how this works, I want to show what a zero-to-running containerized ASP.NET Core application looks like: # create a new project and move to its directory dotnet new mvc -n my-awesome-container-app cd my-awesome-container-app # add a reference to a (temporary) package that creates the container dotnet add package Microsoft.NET.Build.Containers # publish your project for linux-x64 dotnet publish --os linux --arch x64 -p:PublishProfile=DefaultContainer # run your app using the new container docker run -it --rm -p 5010:80 my-awesome-container-app:1.0.0 Now you can go to http://localhost:5010 and you should see the sample MVC application, rendered in all its glory. For this release, you must have Docker installed and running for this sample to work. Additionally, only Linux-x64 containers are supported. Motivation Containers are an excellent way to bundle and ship applications. A popular way to build container images is through a Dockerfile - a special file that describes how to create and configure a container image. Let's look at one of our samples for an ASP.NET Core application's Dockerfile here: # https://hub.docker.com/_/microsoft-dotnet FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build WORKDIR /source # copy csproj and restore as distinct layers COPY aspnetapp/*.csproj . RUN dotnet restore --use-current-runtime # copy everything else and build app COPY aspnetapp/. . RUN dotnet publish -c Release -o /app --use-current-runtime --self-contained false --no-restore # final stage/image FROM mcr.microsoft.com/dotnet/aspnet:7.0 WORKDIR /app COPY --from=build /app . ENTRYPOINT ["dotnet", "aspnetapp.dll"] This project uses a multi-stage build to both build and run the app. It uses the 7.0 SDK image to restore the application's dependencies, publish the application to a folder, and finally create the final runtime image from that directory. This Dockerfile works very well, but there are a few caveats to it that aren't immediately apparent, which arise from the concept of a Docker build context. The build context is a the set of files that are accessible inside of a Dockerfile, and is often (though not always) the same directory as the Dockerfile. If you have a Dockerfile located beside your project file, but your project file is underneath a solution root, it's very easy for your Docker build context to not include configuration files like Directory.Packages.props or NuGet.config that would be included in a regular dotnet build. You would have this same situation with any hierarchical configuration model, like EditorConfig or repository-local git configurations. This mismatch between the explicitly-defined Docker build context and the .NET build process was one of the driving motivators for this feature. All of the information required to build an image is present in a standard dotnet build, we just needed to figure out the right way to represent that data in a way that container runtimes like Docker could use. How does it work A container image is made of two primary parts: some JSON configuration containing metadata about how the image can be run, and a list of tarball archives that represent the file system. In .NET 7, we added several APIs to the .NET Runtime for handling TAR files and streams, and that opened the door to manipulating container images programmatically. This approach has been demonstrated very successfully in projects like Jib in the Java ecosystem, Ko for Go, and even in .NET with projects like konet. It's obvious that a simple tool-driven approach to generate container images is becoming more popular. We built the .NET SDK solution with the following goals: * Provide seamless integration with existing build logic, to prevent the kinds of context gaps mentioned earlier * Implement in C#, to take advantage of our own tool and benefit from .NET runtime performance improvements * Integrated into the .NET SDK, so that it is straightforward for the .NET team to improve and service in the existing .NET SDK processes Customization Those of you with experience writing Dockerfiles are probably wondering where all of the complexity of the Dockerfile has gone. Where is the FROM base image declared? What tags are used? Many aspects of the generated image are customizable by you through the use of MSBuild properties and items (you can read about that in detail at the documentation), but we've shipped a few defaults to make getting started easier. Base Image The base image defines which functionality you will have available and which OS and version you will be using. The following base images are automatically chosen: * for ASP.NET Core apps, mcr.microsoft.com/dotnet/aspnet * for self-contained apps, mcr.microsoft.com/dotnet/runtime-deps * for all other apps, mcr.microsoft.com/dotnet/runtime In all cases, the tag used for the base image is the version portion of the TargetFramework that has been chosen for the application - for example, a TargetFramework of net7.0 would result in a tag of 7.0 being used. These simple-version tags are based on Debian distributions of linux - if you want to use a different supported distro like Alpine or Ubuntu then you would need to manually specify that tag (see the ContainerBaseImage example below). We think that the choice of defaulting to the Debian-based versions of the runtime images is the best choice for broad compatibility with most applications' needs. Of course, you are free to choose any base image for your containers. Simply set the ContainerBaseImage property to any image name and we'll do the rest. For example, maybe you want to run your web application on Alpine Linux. That would look like this: mcr.microsoft.com/dotnet/aspnet:7.0-alpine Image name and version The name of your image will be based on the AssemblyName of your project by default. If that's not a good fit for you, the name of the image can be explicitly set by using the ContainerImageName property. An image also needs a tag, so we default to the value of the Version property. This defaults to 1.0.0, but you are free to customize this in any way and we'll make use of it. This fits especially well with automated versioning schemes like GitVersioning, where the version is derived from some configuration data in the repository. This helps ensure that you always have a unique version of your application to run. Unique version tags are especially important for images, because pushing an image with the same tag to a registry will overwrite the image that was previously stored as that tag. Everything else Many other properties can be set on an image, like custom Entrypoints, Environment Variables, and even arbitrary Labels (which are often used for tracking metadata like SDK version, or who built the image). In addition, images are often pushed to destination registries by specifying a different base registry. In subsequent versions of the .NET SDK we plan to add support for these capabilities in a similar manner as described above - all controlled through MSBuild project properties. When should you use this Local development If you need a container for local development, now you can have one with a single command. dotnet publish --os linux --arch x64 -p:PublishProfile=DefaultContainer will make a Debug-configuration container image named after your project. Some users have made this even simpler by putting these properties into a Directory.Build.props and simply running dotnet publish: linux-x64 DefaultContainer You could also use other SDK and MSBuild features like response files or PublishProfiles to create groups of these properties for easier use. CI Pipelines Overall, building container images with the SDK should integrate seamlessly into your existing build processes. A sample of a minimal GitHub Actions workflow to containerize an app is just about 30 lines of configuration: name: Containerize ASP.NET Core application on: [push] jobs: build: runs-on: ubuntu-latest steps: - uses: actions/checkout@v3 - name: Setup .NET SDK uses: actions/setup-dotnet@v2 # Package the app into a linux-x64 container based on the dotnet/aspnet image - name: Publish run: dotnet publish --os linux --arch x64 --configuration Release -p:PublishProfile=DefaultContainer # Because we don't yet support pushing to authenticated registries, we have to use docker to # login, tag and push the image. In the future none of these steps will be required! # 1. Login to our registry so we can push the image. Could use a raw docker command as well. - name: Docker Login uses: actions-hub/docker/login@master env: DOCKER_REGISTRY_URL: sdkcontainerdemo.azurecr.io DOCKER_USERNAME: ${{ secrets.ACR_USERNAME }} DOCKER_PASSWORD: ${{ secrets.ACR_PAT }} # 2. Use the tag command to rename the local container to match our Azure Container Registry URL - name: Tag built container with Azure Container Registry url uses: actions-hub/docker/cli@master with: args: tag sdk-container-demo:1.0.0 sdkcontainerdemo.azurecr.io/baronfel/sdk-container-demo:latest # 3. Push the renamed container to ACR. - name: Push built container to Azure Container Registry uses: actions-hub/docker/cli@master with: args: push sdkcontainerdemo.azurecr.io/baronfel/sdk-container-demo:latest This is part of an example repo called baronfel/sdk-container-demo made to demonstrate this end-to-end process. There is one major scenario that we won't be able to handle at all with SDK-built containers, though. RUN commands There's no way of performing RUN commands with the .NET SDK. These commands are often used to install some OS packages or create a new OS user, or any number of arbitrary things. If you would like to keep using the SDK container building feature, you can instead create a custom base image with these changes and then using this base image as the ContainerBaseImage as described above. As an example, let's say I'm working on a library that needs the libxml2 library installed on the host in order to do some custom XML processing. I could write a Dockerfile like this to capture this native dependency: FROM mcr.microsoft.com/dotnet/runtime:7.0 RUN apt-get update && \ apt-get install -y libxml2 && \ rm -rf /var/lib/apt/lists/* Now, I can build, tag, and push this image to my registry and use it as a base for my application: docker build -f Dockerfile . -t registry.contoso.com/my-base-image:1.0.0 docker push registry.contoso.com/my-base-image:1.0.0 In the project file of my application I'd set the ContainerBaseImage property to this new image: ... registry.contoso.com/my-base-image:1.0.0 ... Temporary gaps This is the initial preview of SDK-built container images, so there are some features that we haven't yet been able to deliver. Windows images and non-x64 architectures We have focused on the Linux-x64 image deployment scenario for this initial release. Windows images and other architectures are key scenarios we plan to support for the full release, so watch out for new developments there. Pushing to remote registries We have not yet implemented support for authentication, which is critical for many users. This is one of our highest priority items. In the interim, we suggest pushing to your local Docker daemon, then using docker tag and docker push to push the generated images to your destination. The sample GitHub Action above shows how this can be done. Some image customization Several image metadata customizations have not been implemented yet. This includes custom Entrypoints, environment variables, and custom user/group information. A full list can be seen on dotnet/ sdk-container-builds. Next Steps Over the release candidate phases of the .NET 7 release we will be adding new image metadata, support for pushing images to remote registries, and support for Windows images. You can track that progress at the milestone we've created for this. We also plan on integrating this work directly into the SDK throughout the release. When that happens, we'll be releasing a 'final' version of the package on NuGet that will warn you of the change, and ask you to remove the Package entirely from your project. If you are interested in cutting-edge builds of the tool, we also have a GitHub package feed where you can opt into trying the latest work. If you encounter issues using the SDK container image builder, let us know and we'll do our best to help you out. Closing thoughts We would love for those of you building Linux containers to try building them with the .NET SDK. I've personally had a blast trying them out locally - I had a good time going to some of my demo repositories and containerizing them with a single command, and I hope you all feel the same! Happy image building! [png] Chet Husk Program Manager, .NET Tools Team Follow Posted in .NET .NET Core ASP.NET Core Containers Docker Read next .NET MAUI eBook Now Available - Enterprise Application Patterns Looking to get started with .NET MAUI and need architecture guidance? The new free .NET MAUI eBook on enterprise application patterns is now available. [png]Michael Stonis August 25, 2022 2 comments .NET Framework August 2022 Cumulative Update Preview Updates August 2022 Cumulative Update Preview Updates for .NET Framework. [png]Salini Agarwal August 26, 2022 0 comment 21 comments Leave a commentCancel reply Log in to join the discussion. * [png] William Liu August 25, 2022 5:04 pm collapse this comment Does the sample at the beginning of the article require .net 7 SDK, right? Log in to Reply + [png] Chet HuskMicrosoft employee August 25, 2022 5:35 pm collapse this comment That's right - specifically it requires .NET 7 preview 7 or greater. Log in to Reply * [png] Dan Friedman August 25, 2022 5:05 pm collapse this comment Nice work. Thanks for always simplifying things for us. Log in to Reply + [png] Chet HuskMicrosoft employee August 26, 2022 6:50 am collapse this comment That's what we're here for! Have you had a chance to give container builds a try? Log in to Reply * [png] Amit E August 25, 2022 8:29 pm collapse this comment This is a great addition and should greatly simplify containerization in some scerios. I hope to see an even deeper integration, maybe by adding a dedicated command (dotnet container?) or parameter (dotnet publish -container?) and reduce the need to use more obscure switches (specifically -p:PublishProfile=DefaultContainer). Would also be great to have a simple way to generate the dockerfile that will generate the same image that the publish command creates. Log in to Reply + [png] Chet HuskMicrosoft employee August 25, 2022 8:51 pm collapse this comment I completely agree! I logged a dotnet/sdk issue a while back about making Publish Profiles feel more first-class (in a way that doesn't compromise the overall generic nature of the .NET CLI): https://github.com/dotnet/sdk/issues/26161 Any feedback you have on that would be very welcome. Log in to Reply o [png] Amit E August 26, 2022 8:51 am collapse this comment So assuming the publish profile is named "container": dotnet publish --profile container That would definitely be an improvement. Log in to Reply * [png] Diego Bonura August 25, 2022 11:53 pm collapse this comment So cool! what about ARM images support? Log in to Reply + [png] Chet HuskMicrosoft employee August 26, 2022 6:47 am collapse this comment It's on the roadmap - check out https://github.com/dotnet/ sdk-container-builds/issues/91 for more details, but it should be relatively straightforward to do. Once it's done, supplying a Runtime Identifier (either via the --runtime/-r CLI option or the RuntimeIdentifier MSBuild property) with an architecture of arm64 would cause us to choose the appropriate arm architecture if the chosen image supports it. All of the Microsoft-provided .NET base images listed in the article do support ARM so it should all line up. Log in to Reply * [png] Howard van Rooijen August 26, 2022 12:55 am collapse this comment Great work. Really looking forward to integrating this into our CI/CD pipelines. Log in to Reply + [png] Chet HuskMicrosoft employee August 26, 2022 6:49 am collapse this comment Thanks Howard - I'm looking forward to hearing from you and your team about how it works for you. Log in to Reply * [png] Shawn Stoddard August 26, 2022 8:24 am collapse this comment Any thoughts about support software other than Docker - say PodMan for example? Log in to Reply + [png] Chet HuskMicrosoft employee August 26, 2022 9:00 am collapse this comment We definitely want to support alternative container engines like podman. I just tested our support with podman-machine on Windows and I was able to push my image and run it, though I did have to use Docker CLI commands that transparently used my podman machine. The podman-specific commands didn't run, so I'll raise an issue on the repo about investigating that specifically - as a goal podman run, podman list, and all other podman commands should work just as well as docker commands. Log in to Reply o [png] Chet Husk August 27, 2022 7:09 am collapse this comment Following up here - podman actually works seamlessly, it's just you have to be very aware of if you're running podman machine on Windows in rootless mode or not, since those modes change the storage location of the loaded container images. Log in to Reply * [png] nazar554 August 26, 2022 8:29 am collapse this comment Does this work with packages.lock.json and -locked-mode ? Also it would be great if SDK could use it to generate a software bills of materials (SBOM) Log in to Reply + [png] Chet HuskMicrosoft employee August 26, 2022 9:06 am collapse this comment There are some pain points with packages.lock.json and publish, especially with runtime identifiers. This is because publish uses restore to acquire runtime-specific assets that aren't part of a normal restore. There's an issue over at the NuGet/Home repository that goes into the details and some workarounds, but we don't have a solid set of guidance yet on how these features should be integrated. Log in to Reply * [png] Mark Stega August 26, 2022 2:06 pm collapse this comment This looks to be a very useful addition to the SDK About the article: 1) It would be nice to describe why the CI script uses actions-hub/docker/login & cli rather than just using docker commands 2) What does having the 'dotnet build' accomplish that isn't done in the subsequent 'dotnet publish' step? 3) Why does the build have those 2 environment vars declared? About using the feature: I added this publish step to my github actions: 'dotnet publish ICEBG.Web.DataServices/ICEBG.Web.DataServices.csproj -os linux -arch x64 -configuration Azure -p:PublishProfile=DefaultContainer -p:Version=2022-08-26-21-29-29-WIP'. I do not seem to have an image with the tag I expected. After doing the publish I execute a 'docker images -a' command. I don't see an image with the expected tag. I see either 6 images as in: REPOSITORY TAG IMAGE ID CREATED SIZE 229416 6e1367aa97844c89b4a25a987bf5a0ba 9aa1a65ab488 28 seconds ago 220MB 47cde3a84d9e 29 seconds ago 220MB 4f0b4b1fe90b 29 seconds ago 220MB 229416 575ed5c505ea4307943e45d0e6d6c104 f81699aabf05 31 seconds ago 220MB e4b930a957ba 32 seconds ago 220MB f8ccc4a1f9be 32 seconds ago 220MB node 16 bfb7b2a05614 9 days ago 910MB node 16-alpine 5dcd1f6157bd 9 days ago 115MB node 14-alpine d12c0eadaee1 2 weeks ago 119MB alpine 3.13 6b5c5e00213a 2 weeks ago 5.62MB alpine 3.14 dd53f409bf0b 2 weeks ago 5.6MB node 14 52e5cabe9b9c 3 weeks ago 914MB buildpack-deps buster c75e17448eed 3 weeks ago 804MB buildpack-deps bullseye 810420bc6608 3 weeks ago 835MB ubuntu 20.04 3bc6e9f30f51 3 weeks ago 72.8MB ubuntu 18.04 8d5df41c547b 3 weeks ago 63.1MB debian 10 d4729731066b 3 weeks ago 114MB debian 11 07d9246c53a6 3 weeks ago 124MB buildpack-deps stretch 9d4f40bcbdd3 2 months ago 835MB debian 9 662c05203bab 2 months ago 101MB moby/buildkit latest a2c9241854f2 3 months ago 142MB node 12 6c8de432fc7f 4 months ago 918MB node 12-alpine bb6d28039b8c 4 months ago 91MB alpine 3.12 24c8ece58a1a 4 months ago 5.58MB ubuntu 16.04 b6f507652425 12 months ago 135MB docker stable b0757c55a1fd 21 months ago 220MB or 3 images as in REPOSITORY TAG IMAGE ID CREATED SIZE 229416 c5540378845c43989cfd8b4dd78757c4 ed0a482e5e09 32 seconds ago 220MB 931a6389bed0 33 seconds ago 220MB f2ec7d74725e 33 seconds ago 220MB Log in to Reply + [png] Chet HuskMicrosoft employee August 26, 2022 3:06 pm collapse this comment Hi Mark, thanks for your feedback. I'll address your points here and then look at what edits I should make to the blogpost. 1) Since authentication isn't solved by the new feature yet, in order to actually push to Azure we need to login via the Docker CLI. Then later, to actually take our image from the local Docker daemon to Azure Container Registry we use docker tag to rename the local image to match the destination registry and docker push to push the image to the registry. Both of these docker commands will not be necessary in a future release, the publish command itself will handle pushing to the registry. 2) In this case nothing, I can probably delete it entirely to avoid confusion. 3) I'm assuming you mean the GITHUB_USERNAME and GITHUB_TOKEN environment variables? Those are because this sample was written before the package was pushed to NuGet.org, so I was getting the package from a GitHub Packages feed, and those variables were part of the authentication to that feed. Now that the package is available on NuGet.org I can remove them entirely from both the sample project and this post. Finally, I'd love to help dig into why no container was built in your case. There are two primary causes I can immediately think of: the first is that you may not be on the correct version of the .NET SDK. You'll need 7.0.100-preview.7 or greater. The second is that your project (despite the name) isn't a Web project (meaning a project with the Microsoft.NET.Sdk.Web SDK in its project file). We currently don't have PublishProfile support for non-web projects, though we do plan to have it in a future release. See https:/ /github.com/dotnet/sdk-container-builds/issues/141 for details there. In the meantime, if you do have a non-web project, you can publish the container directly by adding / p:PublishContainer to your dotnet publish command. If neither of these is the case, I invite you to open an issue at the parent repository and we can talk about getting a binlog to help dig into the problem. Thanks! Log in to Reply o [png] Mark Stega August 27, 2022 6:28 am collapse this comment Chet, Nice cleanup, much easier to follow in the current form. I definitely have a web project using Microsoft.Net.Sdk.Web but I messed up my global.json file. After fixing that, the issue becomes clear: You have an argument on the dotnet publish line of ' -p:PublishProfile=DefaultContainer' and that profile is not part of the repository. My dotnet publish results in /home/runner/.dotnet/sdk/7.0.100-preview.7.22377.5/Sdks/Microsoft.NET.Sdk.Publish/targets/DotNetCLIToolTargets/Microsoft.NET.Sdk.DotNetCLITool.targets(104,11): error MSB4057: The target "PublishContainer" does not exist in the project. [/home/runner/work/ICEBG/ICEBG/ICEBG.Web.DataServices/ICEBG.Web.DataServices.csproj] which is an interesting error since I don't reference 'PublishContainer' My publish command is: - name: Publish, tag, and push DS image uses: actions-hub/docker/login@master env: DOCKER_REGISTRY_URL: ${{ secrets.REGISTRY_LOGIN_SERVER }} DOCKER_USERNAME: ${{ secrets.REGISTRY_USERNAME }} DOCKER_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }} - run: | dotnet --info sudo docker images -a dotnet publish ICEBG.Web.DataServices/ICEBG.Web.DataServices.csproj --os linux --arch x64 --configuration Azure -p:PublishProfile=DefaultContainer -p:Version=${{ needs.version.outputs.suffix }} sudo docker images -a The expanded version of the publish command shows as: dotnet publish ICEBG.Web.DataServices/ICEBG.Web.DataServices.csproj --os linux --arch x64 --configuration Azure -p:PublishProfile=DefaultContainer -p:Version=2022-08-27--13-11-46--WIP Log in to Reply # [png] Chet Husk August 27, 2022 7:12 am collapse this comment One of the parts of this feature was providing that default PublishProfile in the SDK itself, much in the same way that the existing default publish profiles are shipped. So if you're running on preview 7 or greater you should have that profile as part of your SDK. The specific error shown here is what I would expect if you didn't have the Microsoft.Net.Build.Containers package added to your project - it provides the implementation of the target listed in the error. Can you check your package references and make sure that package is available? Log in to Reply @ [png] Mark Stega August 27, 2022 8:10 am collapse this comment Chet, Thanks, you absolutely nailed the issue. I had totally forgotten to add the package. Is it expected to have multiple images created on the publish step? From 'docker images -a': REPOSITORY TAG IMAGE ID CREATED SIZE icebg.web.dataservices 2022-08-27--15-06-14--WIP e76e909e7988 9 seconds ago 230MB 229416 9682efcb28a740f3ae9c822d45451f9a 9256ae07657a 44 seconds ago 220MB none none e9ce4e2a4360 45 seconds ago 220MB none none 0609c5b67892 45 seconds ago 220MB Relevant Links .NET Download .NET Hello World .NET Meetup Events .NET Documentation .NET API Browser .NET SDKs .NET Application Architecture Guides Web apps with ASP.NET Core Mobile apps with Xamarin.Forms Microservices with Docker Containers Modernizing existing .NET apps to the cloud Archive August 2022 July 2022 June 2022 May 2022 April 2022 March 2022 February 2022 January 2022 December 2021 November 2021 October 2021 September 2021 August 2021 July 2021 June 2021 May 2021 April 2021 March 2021 February 2021 January 2021 December 2020 November 2020 October 2020 September 2020 August 2020 July 2020 June 2020 May 2020 April 2020 March 2020 February 2020 January 2020 December 2019 November 2019 October 2019 September 2019 August 2019 July 2019 June 2019 May 2019 April 2019 March 2019 February 2019 January 2019 December 2018 November 2018 October 2018 September 2018 August 2018 July 2018 June 2018 May 2018 April 2018 March 2018 February 2018 January 2018 December 2017 November 2017 October 2017 September 2017 August 2017 July 2017 June 2017 May 2017 April 2017 March 2017 February 2017 January 2017 December 2016 November 2016 October 2016 September 2016 August 2016 July 2016 June 2016 May 2016 April 2016 March 2016 February 2016 January 2016 December 2015 November 2015 October 2015 September 2015 August 2015 July 2015 June 2015 May 2015 April 2015 March 2015 February 2015 January 2015 December 2014 November 2014 October 2014 September 2014 August 2014 July 2014 June 2014 May 2014 April 2014 March 2014 February 2014 January 2014 December 2013 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 May 2013 April 2013 March 2013 February 2013 January 2013 December 2012 November 2012 October 2012 September 2012 August 2012 July 2012 June 2012 May 2012 April 2012 March 2012 February 2012 January 2012 October 2011 September 2011 August 2011 June 2011 April 2011 March 2011 February 2011 January 2011 December 2010 November 2010 October 2010 September 2010 August 2010 July 2010 June 2010 May 2010 April 2010 March 2010 February 2010 December 2009 November 2009 October 2009 September 2009 August 2009 July 2009 June 2009 May 2009 April 2009 March 2009 February 2009 January 2009 December 2008 November 2008 October 2008 September 2008 August 2008 July 2008 June 2008 May 2008 April 2008 March 2008 February 2008 January 2008 December 2007 November 2007 October 2007 September 2007 August 2007 July 2007 June 2007 May 2007 April 2007 March 2007 February 2007 January 2007 December 2006 November 2006 October 2006 September 2006 August 2006 July 2006 June 2006 May 2006 April 2006 March 2006 February 2006 January 2006 October 2005 July 2005 May 2005 December 2004 November 2004 September 2004 June 2004 Topics .NET ASP.NET .NET Core ASP.NET Core .NET Framework Blazor Entity Framework C# Azure Visual Studio WPF .NET MAUI ML.NET Performance Machine Learning F# WinForms Maintenance & Updates AI Machine Learning .NET Internals Containers Security SignalR Community Standup Conversations Developer Stories Cloud WCF Game Development Show dotnet Debugging Lifecycle Networking Docker WebHooks GitHub Actions gRPC XAML Maoni Async Concurrency GC TPL Visual Basic Featured Apache Big Data Spark for .NET Static Analysis Orchard Core SQL Server JSON IoT LOH Stay informed Login Insert/edit link Close Enter the destination URL URL [ ] Link Text [ ] [ ] Open link in a new tab Or link to existing content Search [ ] No search term specified. 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