Scott Hanselman

.NET Core 1.0 is now released!

June 28, 2016 Comment on this post [54] Posted in ASP.NET | Open Source
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I feel like it's the culmination of all these years of work in .NET and Open Source. This is why I came to work at Microsoft; we wanted to open source as much as we could and build a community around .NET and open source at Microsoft. 15 years and the work of thousands of people later, today we released .NET Core 1.0.

Take a moment and head over to and check out the download page. It's got a really nice place you can try out C# directly in the browser without having to install anything! There's also a great C# Tutorial with interactive browser-based tools as well.

.NET Core 1.0 runs on Windows, Mac, and several flavors of Linux including RedHat Enterprise Linux and Ubuntu. It supports C#, VB (soon), and F# and modern constructs like generics, Language Integrated Query (LINQ), async support and more. The Core Runtime, libraries, compiler, languages and tools are all open source on GitHub where contributions are accepted, tested and fully supported.

Getting started with .NET Core

What is .NET Core? Here's some details from the .NET Blog:

.NET Core is a new cross-platform .NET product. The primary points of .NET Core are:

  • Cross-platform: Runs on Windows, macOS and Linux.
  • Flexible deployment: Can be included in your app or installed side-by-side user- or machine-wide.
  • Command-line tools: All product scenarios can be exercised at the command-line.
  • Compatible: .NET Core is compatible with .NET Framework, Xamarin and Mono, via the .NET Standard Library.
  • Open source: The .NET Core platform is open source, using MIT and Apache 2 licenses. Documentation is licensed under CC-BY. .NET Core is a .NET Foundation project.
  • Supported by Microsoft: .NET Core is supported by Microsoft, per .NET Core Support

.NET Core is composed of the following parts:

  • A .NET runtime, which provides a type system, assembly loading, a garbage collector, native interop and other basic services.
  • A set of framework libraries, which provide primitive data types, app composition types and fundamental utilities.
  • A set of SDK tools and language compilers that enable the base developer experience, available in the .NET Core SDK.
  • The ‘dotnet’ app host, which is used to launch .NET Core apps. It selects and hosts the runtime, provides an assembly loading policy and launches the app. The same host is also used to launch SDK tools in the same way.


Here are the major blogs carrying the announcement.

We are also releasing .NET documentation today at, the new documentation service for Microsoft. The documentation you see there is just a start. You can follow our progress at core-docs on GitHub. ASP.NET Core documentation is also available and open source.

Have fun!

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About Scott

Scott Hanselman is a former professor, former Chief Architect in finance, now speaker, consultant, father, diabetic, and Microsoft employee. He is a failed stand-up comic, a cornrower, and a book author.

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June 28, 2016 2:05
Well done Scott and the entire .Net Team out there. Giant leap for .Net Community.
June 28, 2016 2:12
This is great timing for my team as it will allow us to share .NET Core Class Libraries between ASP.NET MVC, Xamarin/Android and WPF apps.

Congrats to Scott(s), Damian E, David F and all at Microsoft.
June 28, 2016 2:24
Great things happening!!! So happy to be a .NET Developer:)
June 28, 2016 2:45
Congrats to you, the entire .net team and Microsoft ad a whole, this is a really huge accomplishment.
Just one side note: in the screenshot above, from the tutorial, shouldn't it be using the "using" statement like this?

using (HttpClient client ...
June 28, 2016 3:11
You say .NET Core supports VB (.NET) and F#, but elsewhere I've read that the support is still forthcoming.

Are the languages built-in and just waiting for tooling and templates, or do we have to wait for VB and F# support in an upcoming release?
June 28, 2016 3:59
@njy: 'using' and 'async' code don't play nicely together. When you make async calls and then continue on from there, objects you are 'using' don't usually survive. We found this out the hard way. Now we typically try{ var foo = new DisposableFoo(); ... make async calls ... use foo... } finally { foo.Dispose() }. There may be a better way, but unless/until they fix it I don't know what that is. Maybe Scott can comment on that?
June 28, 2016 4:51
Apologies for the double-post, as I know Scott likes to hear about customer experiences.

First, congrats to the whole team on this amazing milestone. Two notes:

1) A note: I was having trouble following along with the debugging step in VS Code, until I tried updating the C# plugin to TODAY's release (6/27/16). You can do this using [Ctrl+P] and then "ext install csharp"

2) A comment: The "File->New..." experience is quite different to .NET 4.X, and a little more guidance around adding .NET library dependencies would be helpful. For example, I was getting compiler errors when I wrote my first line of code in the body of Program.Main, "var dcs = new System.Runtime.Serialization.DataContractSerializer();" until I realized that each of these is now a NuGet package. I remembered reading that it was redesigned as "opt-in" but it still took me some time to figure out what was going on. In my case, it was even more confusing, because I added the NuGet that corresponded to my namespace (System.Runtime.Serialization), and even that wasn't enough, as I needed to bring in System.Runtime.Serialization.Xml. This makes sense from a design perspective - I like it a lot - but it clearly needs more tooling for us dark matter developers, and I'm sure (or at least hope) this is on the roadmap.
June 28, 2016 5:54
Evil Spock :-) Thanks for today's presentation of .NET Core & ASP.NET Core. You are a STAR! I love you style of presentation!
June 28, 2016 5:55
Congrats to you & all team members who were working on .NET Core & ASP.NET Core! Great project!
June 28, 2016 6:44
Congrats to the team, and thank you! :-)
One question please: when and how the MCSD Web Developer certificate will be updated to reflect the new technology?

June 28, 2016 7:33
Congratulations and thanks for giving us a new, cool and great .Net platform in this era of so many great competing frameworks to choose from dotnet continues to be an exciting platform
June 28, 2016 8:15
Congratulations to all of you at Microsoft. Really excited about this. Eagar to get my hand dirty around it.
June 28, 2016 8:49
Congratulation everyone involved in the development of .NET core. It is indeed a new beginning for the .NET community. Cheers
June 28, 2016 11:01
AWESOME!!! This is amazing, I have been looking forward this for such a long time. Thank you all for your hard work.
June 28, 2016 12:14
This has been an amazing ride and I've thoroughly enjoyed watching .net core grow and evolve, especially core.

However, this is just the beginning of greater things, here's to everyone involved for making an amazing platform to develop for!
June 28, 2016 12:49
Congratulations to every one at Microsoft for this incredible milestone in the history of software development.
June 28, 2016 13:54
Great job !
June 28, 2016 13:56
I will try and start blogging about the cool features of it! Thanks to Microsoft team.
June 28, 2016 14:15
I few month ago i tried to port some db access libraries to vNext.
The biggest problem i found, to my needs, is the lack of support to DataTable and DataRow.

Is there anything, in the new version, which helps to solve the problem?
What can I use instead? (I don't like EF..)

June 28, 2016 14:21
Two related issues when installing on UBuntu 14.04.

1. sudo apt-get install dotnet-dev-1.0.0-preview2-003121, is the command suggested on the website, but why in the world is it Preview?

2. What's worse is the following error: Unable to locate package dotnet-dev-1.0.0-preview2-003121

Yikes, it doesn't even exist, which is likely a good thing, since it should be out of preview.

I understand there are a LOT of moving parts when shipping for multiple platforms, so any information to get this going, would be helpful.
June 28, 2016 14:34
And another great work from Microsoft! As always!
June 28, 2016 16:39
congrats scott for release and your session at devnation you nailed it ;).
can you get some news about ssrs reporting in core environment. no clues til the moment.
June 28, 2016 16:57
I've noticed that the installers are still indicating Preview. Is that intentional or are there different installers out there and the website is just out of date?

Thanks you and congrats.
June 28, 2016 17:00

You shouldn't let a lack of DataTable or DataRow be a hindrance. You can and should get by just using a reader and populating some sort of model object, ORM style. That doesn't mean you have to use EF.
June 28, 2016 17:04
June 28, 2016 17:46
Congrats Scott and team!! Really an amazing milestone!
June 28, 2016 18:04
Top work Scott & teams.
re Flexible deployment:
Can I assume core can be installed side-by-side without overwriting anything... if we're still writing... legacy .net work :)
June 28, 2016 21:41
Is there any information on what versions of Windows this runs on? Being able to deploy an application as a stand-alone has a lot of appeal but we have clients with all sorts of different versions of Windows. It's great that it runs on Linux and Mac but I can't find any info about Windows versions.
June 28, 2016 22:02
This is so great Scott, and the rest of the team.

This is a totally new Microsoft we are seeing the last couple of years. It is really nice to see Microsoft embracing and using other systems and services that work, to make their product, .NET in this case, better. Here I'm referring to the use of Github in particular. .NET, Xamarin.Forms etc. are now on Github and I think this will have a major impact on how things are doing in the future.

Another sample is how Microsoft handles documentation. Have you noticed the "Edit on Github" link in top of all Azure documentation pages? Yes, its all on Github, and you have just fix things and submit a Pull Request, if you find a bug or something missing. I see you are doing a similar thing with .NET Core now, and plans are that Xamarin and Unity3d will do the same.
So. Freaking. Awesome!!!

Keep up the good work Scott and Team! Us .NET developers REALLY, REALLY, REALLY appreciate it.
June 28, 2016 22:52
How long is Update 3 supposed to take to install? I've got a Core i7 and an SSD, and two hours later it's still installing.
June 28, 2016 23:19
Congratulations !!! Great Work by Microsoft and Team.
June 29, 2016 2:48
Obligatory link for this is why I came to work... ;)

June 29, 2016 2:58
@JasonH I'm not sure what you are seeing but `async` and `using` work fine together. Async wouldn't be much of a language feature if it broke the fundamental resource disposal mechanism.

Congrats on the release, Scott!
June 29, 2016 7:41
Congratulations and thank you for the tutorial
June 29, 2016 10:13
@Mads Laumannn yes the docs look interesting but I notice examples and comments are missing which are in the original .NET docs - I'm hoping these are coming, because especially examples are very important.
June 29, 2016 11:27
That's great! Now it's time to make WPF, UWP and Visual Studio cross-platform.
June 29, 2016 12:22
I am amazed and glad to see that Microsoft strategy took such turn and led to such results.
I follow your work since MVC and was very sceptical, but with hope, and voila !

Congratulations, you rock !
June 29, 2016 14:07

Looking forward to starting to use Asp.Net Core, but unfortunately I still can't.

IIS requires Asp.Net Core Module which, in the downloads we are guided to, is still not released.

When will this IIS module be released?
June 29, 2016 16:24
June 30, 2016 4:36
Anyone knows where i can grab the update 3 iso? I got several vs installation from various boxes. I see that there is an ISO for "Visual Studio Communication WITH Update 3". i just want to update 3 bits.
June 30, 2016 15:39
Congratulations to the team, the contributors!

And a big thank you Scott, for being one of the people that has pushed for this.

Now let's get some understandable docs about run times, platforms, frameworks, libraries and packages, because that's just making my head hurt :(
June 30, 2016 18:54
Congratulations and thanks for sharing !
July 01, 2016 2:17
Great job MS team.

Additional note from me. After upgrade to VS 2015 update 3, it broke Razor Intellisense. It seems .NET core tools for VS removed MVC from the project template
July 01, 2016 6:35
Superb Job and Thank you All at Microsoft for taking this initiative and pains. This will have a big impact on our career as developers.
July 04, 2016 14:27
The next big step will be ASP.NET Core inside CPanel and Plesk panel as a feature.
There is a million users using Cpanel and Plesk in Shared Hosting environment. If ASP.NET become available inside that hosting panels, that will be a big big step for .NET Web Scripting.
Most developers use PHP because it comes with hosting panels.
Any one has ideia if the think will happen?
July 04, 2016 21:29
I wish that when I go to the download site to download the released version, the thing that actually downloads does not have the word "preview" in the filename. Makes me think it may not be the released version.
July 05, 2016 12:40
Congrats Scott, great work. Thumps Up emoticon :)
July 08, 2016 22:13
do you need internet access to install DotNetCore.1.0.0-WindowsHosting.exe.
July 09, 2016 11:19
Thanks Scott,
For this important updates. feeling glad that i am working framework.
July 12, 2016 1:51
Looks promising, but when I tried to start working with core, I found out that important libraries were missing or immature.
So, I think I'll wait a while before before jumping back into this.
July 13, 2016 11:09
Hello there,
I am still pretty confused about DotNetcore 1.0.
I downloaded required things for DotNetCore 1.0.
When a tried to add a new project, i found only 3 project templates :
1) Console Application
2) Class Library
3) Asp.Net core Application.
Well is it so, DotNet core is all about core capabilities of framework.
Like windows services, small executable or so on and henceforth.
And we cannot build applications like we used to in WPF, Winforms or Silverlight may be.

Please reply.
Thanks in Advance.
July 27, 2016 12:49
Old news . Its .net framework 4.0 released. Anyways thanks for sharing codes.
July 27, 2016 12:57
.NET Core 1.0 great Windows platform . Associated with it for years now. Really Congrats to Scott(s), Damian E, David F and all people at Microsoft.
July 28, 2016 15:08
Using .NET Platform for years. Its far better than free linux PHP platform.

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Disclaimer: The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.