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Get the .NET Core DNX SDK on Windows

These instructions will lead you through acquiring the .NET Core DNX SDK via the .NET Version Manager (DNVM) and running a "Hello World" demo on Windows. The instructions use a particular set of paths. You'll need to adjust if you want to use a different set.

These instructions are for .NET Core console apps. If you want to try out ASP.NET 5 on top of .NET Core - which is a great idea - check out the ASP.NET 5 instructions.

.NET Core NuGet packages and the .NET Core DNX SDKs are available on the ASP.NET 'vnext' myget feed, which you can more easily view on gallery for the feed.

You can also acquire .NET Core directly via NuGet restore or build from source.

Installing DNVM

You need DNVM as a starting point. DNVM enables you to acquire a (or multiple) .NET Execution Environment (DNX). DNVM is simply a script, which doesn't depend on .NET. You can install it via a PowerShell command. You can find alternate DNVM install instructions at the ASP.NET Home repo.

C:\coreclr-demo> @powershell -NoProfile -ExecutionPolicy unrestricted -Command "&{$Branch='dev';iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/aspnet/Home/dev/dnvminstall.ps1'))}"

You must close your command-prompt and start a new one in order for the user-wide environment variables to take effect.

You can see the currently installed DNX versions with dnvm list, which will display an empty set of installed runtimes.

C:\coreclr-demo> dnvm list

Installing a .NET Core DNX

It's easy to install the latest .NET Core-based DNX, using the dnvm install command.

C:\coreclr-demo> dnvm install -r coreclr latest -u

This will install the 32-bit version of .NET Core. If you want the 64-bit version, you can specify processor architecture.

C:\coreclr-demo> dnvm install -r coreclr -arch x64 latest -u

You can see the currently installed DNX versions with dnvm list.

C:\coreclr-demo>dnvm list

Active Version           Runtime Architecture Location
------ -------           ------- ------------ --------
  *    1.0.0-beta5-11649 coreclr x64          C:\Users\rlander\.dnx\runtimes
       1.0.0-beta5-11649 coreclr x86          C:\Users\rlander\.dnx\runtimes

You can choose which of these DNXs you want to use with dnvm use, with similar arguments.

C:\coreclr-demo>dnvm use -r coreclr -arch x86 1.0.0-beta5-11649
Adding C:\Users\rlander\.dnx\runtimes\dnx-coreclr-win-x86.1.0.0-beta5-11649\bin
to process PATH

C:\coreclr-demo>dnvm list

Active Version           Runtime Architecture Location
------ -------           ------- ------------ --------
       1.0.0-beta5-11649 coreclr x64          C:\Users\rlander\.dnx\runtimes
  *    1.0.0-beta5-11649 coreclr x86          C:\Users\rlander\.dnx\runtimes

Write your App

You need a Hello World application to run. You can write your own, if you'd like. Here's a very simple one:

using System;

public class Program
{
    public static void Main (string[] args)
    {
        Console.WriteLine("Hello, Windows");
        Console.WriteLine("Love from CoreCLR.");
    }   
}

Some people on the .NET Core team are partial to a demo console app on corefxlab repo which will print a picture for you. Download the corefxlab demo to C:\coreclr-demo.

You need a project.json that matches your app. Use this one. It will work for both of the apps provided/referenced above. Save the project.json beside your app.

{
    "version": "1.0.0-*",
    "dependencies": {
    },
    "frameworks" : {
        "dnx451" : { },
        "dnxcore50" : {
            "dependencies": {
                "System.Console": "4.0.0-beta-*"
            }
        }
    }
}

Run your App

You need to restore packages for your app, based on your project.json, with dnu restore.

C:\coreclr-demo> dnu restore

You can run your app with the DNX command.

C:\coreclr-demo> dnx . run
Hello, Windows
Love from CoreCLR.