ASP.NET Core vs. ASP.NET 4

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  • ASP.NET Core vs. ASP.NET 4.6

    .NET Framework .NET CoreFull .NET Framework for any scenario and

    library support on Windows

    Modular libraries & runtime optimized for

    server and cloud workloads

  • .Net Core

  • .NET Core is a general purpose development platform maintained by Microsoft and the .NET community on GitHub.

    It is cross-platform, supporting Windows, macOSand Linux, and can be used in device, cloud, and embedded/IoT scenarios.

    On .Net Core

  • Flexible deployment: Can be included in your app or installed side-by-side user- or machine-wide.

    Cross-platform: Runs on Windows, macOS and Linux; can be ported to other OSes.

    Command-line tools: All product scenarios can be exercised at the command-line.

    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

    Compatible: .NET Core is compatible with .NET Framework, Xamarin and Mono, via the .NET Standard


    On .Net Core

  • .Net Standard

  • Solves the code sharing problem for .NET developers

    A set of APIs that all .NET platforms have to implement

    .NET Standard 2.0 will be implemented by .NET Framework,

    .NET Core, and Xamarin.

    .NET Standard will replace Portable Class Libraries (PCLs) as the tooling story for building multi-platform .NET libraries.

    On .Net Standard

  • Platform



    Standardnetstandard 1.0 1.1 1.2 1.3 1.4 1.5 1.6 2.0

    .NET Core netcoreapp 1.0 vNext


    Frameworknet 4.5 4.5.1 4.6 4.6.1 4.6.2 vNext 4.6.1








    uap 10.0 vNext

    Windows win 8.0 8.1


    Phonewpa 8.1




    wp 8.0

  • New dual-train strategy for .NET Core releases:

    Long Term Support (LTS) and Current Release.

    .NET Core 1.1 RTM, the first Current release

    New OS Support in 1.1:Linux Mint 18OpenSUSE 42.1macOS 10.12 (also added to .NET Core 1.0)Windows Server 2016 (also added to .NET Core 1.0)

    But: Tooling for both 1.0 and 1.1 is still preview

    There are two distributions of .NET Core: a Runtime, and an SDK that includes the Runtime and some Tools.

    On .Net Core releases

  • News flash: There are 1380 new APIs in .NET Core 1.1.

    News flash: ASP.NET Core 1.1 with Kestrel was ranked as the

    fastest mainstream fullstack web framework in

    the TechEmpower plaintext benchmark.

    News flash: Google Cloud is joining the .NET Foundation

    Technical Steering Group. Welcome, Google!

  • ASP.NET Core vs. ASP.NET 4.6

    .NET Framework .NET CoreFull .NET Framework for any scenario and

    library support on Windows

    Modular libraries & runtime optimized for

    server and cloud workloads

  • A new lightweight open-source and cross-

    platform framework for building cloud-based Web applications using .NET

    ASP.NET Core

  • ASP.NET Core Design

    Choose your Editors

    and Tools

    Open Source

    with ContributionsCross-PlatformOSS

    Seamless transition

    from on-premises to cloud

    Faster Development CycleTotally Modular


  • HostingKestrel

    MiddlewareRouting, authentication, static files, diagnostics, error handling, session, CORS, localization, and YOUR OWN

    Dependency Injection

    Ships entirely as Nuget

    Cross Platform Support



    Application Frameworks MVC, Identity, SignalR

    ASP.NET Core Features

  • Built on ASP.NET Core

    One set of concepts remove duplication

    Web UI and Web APIs

    Supports .NET Core

    Runs on IIS or self-hosted

    Deep integration with DI

    ASP.NET Core MVC

  • Lets build something: TechSummit Wichtel

    Images courtesy of

  • .NET Core become .csproj/MSBuild based

    Customers wanted their projects to be able to work with existing .NET code they already had

    Interop with existing .NET projects (Project to project references)

    Taking the best features of project.json and moving them into .csproj/MSBuild.

    .NET Core tools are now based on the same technology as other .NET projects. (Proven scalability)

    .NET Core csproj support is now available as an alpha release.Preview 3-based SDK, using CSProj: 1.1.0-sdk-msbuild

    Preview 2-based SDK, using project.json: 1.1.0-sdk-projectjson

    .NET Core is integrated into Visual Studio 2017 RC and Visual Studio for Mac. It can be added to Visual Studio Code by the C# extension. The new Tools release can be used with both the .NET Core 1.0 and .NET Core 1.1 runtimes.

    Watch out! Changes ahead!

  • What is not changing

    One project file Your project file contains dependency and target framework information, all in one file. No source files are listed by default.

    Targets and dependencies .NET Core target frameworks and metapackagedependencies remain the same and are declared in a similar way in the new csprojformat.

    .NET Core CLI Tools The dotnet tool continues to expose the same commands, such as dotnet build and dotnet run.

    .NET Core Templates You can continue to rely on dotnet new for templates (for example, dotnet new -t library).

    Supports multiple .NET Core version The new tools can be used to target .NET Core 1.0 and 1.1. The tools themselves run on .NET Core 1.0 by default.


    Build for Windows

    Use Web Forms, SignalR, MVC, or Web Pages

    One version per machine

    Develop with Visual Studio using C#, VB or F#

    Mature platform

    High performance

    Which one is right for me?

    ASP.NET Core

    Build for Windows, Mac, or Linux

    Use MVC, or Web API

    Multiple versions per machine

    Develop with Visual Studio or Visual Studio

    Code using C#

    New platform

    Ultra performance

  • The ASP.NET Core and Entity Framework, C# and VB docs were

    moved to as part of the last release:

    Check out the .NET Web Development and Tools Blog:

    Docker Images:

    Read more