ASP.Net Core 2.0.0 is out, What’s new?

ASP.Net Core 2.0.0 (major release) is out.

OK, so what’s new??

This is my note from the page;

Full list of what’s in 2.0 is at

Razor Pages

Razor Pages is a new feature of ASP.NET Core MVC that makes coding page-focused scenarios easier and more productive.


ASP.NET Core metapackage

A new ASP.NET Core metapackage includes all of the packages made and supported by the ASP.NET Core and Entity Framework Core teams, along with their internal and 3rd-party dependencies. You no longer need to choose individual ASP.NET Core features by package. All features are included in the Microsoft.AspNetCore.All package. The default templates use this package.


Runtime Store

Applications that use the Microsoft.AspNetCore.All metapackage automatically take advantage of the new .NET Core Runtime Store. The Store contains all the runtime assets needed to run ASP.NET Core 2.0 applications. When you use the Microsoft.AspNetCore.All metapackage, no assets from the referenced ASP.NET Core NuGet packages are deployed with the application because they already reside on the target system. The assets in the Runtime Store are also precompiled to improve application startup time.


.NET Standard 2.0

The ASP.NET Core 2.0 packages target .NET Standard 2.0. The packages can be referenced by other .NET Standard 2.0 libraries, and they can run on .NET Standard 2.0-compliant implementations of .NET, including .NET Core 2.0 and .NET Framework 4.6.1.

The Microsoft.AspNetCore.All metapackage targets .NET Core 2.0 only, because it is intended to be used with the .NET Core 2.0 Runtime Store.

Configuration update

An IConfiguration instance is added to the services container by default in ASP.NET Core 2.0. IConfiguration in the services container makes it easier for applications to retrieve configuration values from the container.


Logging update

In ASP.NET Core 2.0, logging is incorporated into the dependency injection (DI) system by default. You add providers and configure filtering in the Program.cs file instead of in the Startup.cs file. And the default ILoggerFactory supports filtering in a way that lets you use one flexible approach for both cross-provider filtering and specific-provider filtering.


Authentication update

A new authentication model makes it easier to configure authentication for an application using DI.

New templates are available for configuring authentication for web apps and web APIs using Azure AD B2C.


Identity update

We’ve made it easier to build secure web APIs using Identity in ASP.NET Core 2.0. You can acquire access tokens for accessing your web APIs using the Microsoft Authentication Library (MSAL).


SPA templates

Single Page Application (SPA) project templates for Angular, Aurelia, Knockout.js, React.js, and React.js with Redux are available. The Angular template has been updated to Angular 4. The Angular and React templates are available by default; for information about how to get the other templates.


For information about how to build a SPA in ASP.NET Core.


Kestrel improvements

The Kestrel web server has new features that make it more suitable as an Internet-facing server. We’ve added a number of server constraint configuration options in the KestrelServerOptions class’s new Limits property. You can now add limits for the following:

  • Maximum client connections

  • Maximum request body size

  • Minimum request body data rate


WebListener renamed to HTTP.sys

The packages Microsoft.AspNetCore.Server.WebListener and Microsoft.Net.Http.Server have been merged into a new package Microsoft.AspNetCore.Server.HttpSys. The namespaces have been updated to match.


Enhanced HTTP header support

When using MVC to transmit a FileStreamResult or a FileContentResult, you now have the option to set an ETag or a LastModified date on the content you transmit. You can set these values on the returned content with code similar to the following:

The file returned to your visitors will be decorated with the appropriate HTTP headers for the ETag and LastModified values.

If an application visitor requests content with a Range Request header, ASP.NET will recognize that and handle that header. If the requested content can be partially delivered, ASP.NET will appropriately skip and return just the requested set of bytes. You do not need to write any special handlers into your methods to adapt or handle this feature; it is automatically handled for you.

Hosting startup and Application Insights

Hosting environments can now inject extra package dependencies and execute code during application startup, without the application needing to explicitly take a dependency or call any methods. This feature can be used to enable certain environments to “light-up” features unique to that environment without the application needing to know ahead of time.

In ASP.NET Core 2.0, this feature is used to automatically enable Application Insights diagnostics when debugging in Visual Studio and (after opting in) when running in Azure App Services. As a result, the project templates no longer add Application Insights packages and code by default.


Automatic use of anti-forgery tokens

ASP.NET Core has always helped HTML-encode your content by default, but with the new version we’re taking an extra step to help prevent cross-site request forgery (XSRF) attacks. ASP.NET Core will now emit anti-forgery tokens by default and validate them on form POST actions and pages without extra configuration.


Automatic precompilation

Razor view pre-compilation is enabled during publish by default, reducing the publish output size and application startup time.

Razor support for C# 7.1

The Razor view engine has been updated to work with the new Roslyn compiler. That includes support for C# 7.1 features like Default Expressions, Inferred Tuple Names, and Pattern-Matching with Generics. To use C# 7.1 in your project, add the following property in your project file and then reload the solution:


Migration guidance

For guidance on how to migrate ASP.NET Core 1.x applications to ASP.NET Core 2.0, see the following resources:


OK.. lot’s of update.  I ll try to catch up with some demo service soon.

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