What Is Core App Update 2 Or

Watch Video Resources Blog Case Studies Free Webinars Documentation ROI Calculator Support Security Information GDPR Blog Login Start Free Trial How to Build Cross-Platform.NET Core Apps Barry Luijbregts January 15, 2018 Developer Tips, Tricks Resources One of the main reasons for using.NET Core is that you can run it on multiple platforms and architectures.

So you can build an app that will run on Windows, but also on Linux, macOS and on different architectures like x86 and ARM.

This is perfect for lots of scenarios, including desktop applications.

You can learn about other reasons for using.NET Core in this article about the.NET ecosystem on Stackifys blog and in my Pluralsight course: The.NET Ecosystem: The Big Picture.

In this article, Im going to show you how to create a simple.NET Core console application that can run on multiple operating systems.

What Is Core App Update 2 Or

To work through the demos in this article, make sure that you have the following installed on a computer running Windows 10: Visual Studio 2017 any edition (update 2 or higher).NET Core 2 SDK Additionally, in order to run the app on a Mac, you will need access to a Mac that is running macOS 10.12 Sierra or a later version.

There are a couple of differences between the two deployment models: Framework-dependent applications require the.NET Core framework to be installed on the machine that the app will run on.

Self-contained applications dont, because they contain everything the app needs to run Framework-dependent applications can run on any operating system that you install.NET Core on, without modification In contrast, for every OS that you want a self-contained app to run on, you need to publish an OS-specific version How to create an app for multiple operating systems Now that we know there are two different deployment options for.NET Core, lets explore how to use those to run a.NET Core app in multiple operating systems.

To explore this, well create two simple.NET Core console applications and run those on Windows and on macOS.

Ive already created this sample in a GitHub repository that you can find here.

This is technically not needed, as you can create.NET Core applications with many different IDEs and even with the command line.

Framework-dependent app First, well create a framework-dependent app.

We do this in Visual Studio 2017 with all the latest updates (at the moment, Im on 15.5.2).

In Visual Studio, click File New Project and select.NET Core Now select the Console App (.NET Core) project type and create it Navigate to Program.cs.

Out of the box, it will write Hello World to the console Add Console.ReadLine(); below the Hello World line, to keep the console window open when the app runs Thats it This app will run on every o perating s ystem that.NET Core supports.

Self-contained app Next, well create a self-contained app.

This is very similar to creating a framework-dependent app, but contains one extra step: In Visual Studio, click File New Project and select.NET Core Now select the Console App (.NET Core) project type and create it Navigate to Program.cs.

Out of the box, it will write Hello World to the console Add Console.ReadLine(); below the Hello World line, to keep the console window open when the app runs Now for the extra step to make this into a self-contained application.

Right-click the project file and click Edit Project like in the image below: Now, in the project file, add the highlighted line: This tells.NET Core which runtimes it can be built and published for and tells it to create a self-contained app.

Running the app on Windows and macOS So now, we have two.NET Core console applications; one framework-dependent and one self-contained.

Publishing the applications to run on Windows Before we run the apps, we need to publish them, as you would do in production, to get a release build.

For Windows, we can follow the same steps for both applications: In Visual Studio, right-click the project file and click Publish, like in the image below Then, you can pick a folder and click publish.

Thats it Do the same for the self-contained app Publishing for running on macOS If we want the framework-dependent app to run on macOS, we dont have to do anything special, we can just use the publish results of the previous steps.

However, if we want the self-contained app to run on anything other than Windows, we need to take additional steps: In Visual Studio, right-click the project file of the self-contained app and click Edit Project to edit the project file Now add a new Runtime Identifier to the file and save it, just as highlighted here: Now right-click the project file again and click Publish In the Publish overview, click the Settings link This opens the Profile Settings popup that you see in the image below.

In here, make sure that youve selected the Target Runtime osx.10.12-x64 Change the target location to another folder, so that we can distinguish between the Publish results for Windows and the results for macOS Click Save Now click Publish and thats it The runtime identifier that weve just added was one of many that you can find in the.NET Core Runtime Identifier Catalogue here.

Running the applications on Windows We now have the following publish results: Results for the framework-dependent app Results for the self-contained app For Windows For macOS Lets run them.

First, well run the framework-dependent application on Windows: Open Windows Explorer Navigate to the folder that contains the publish results for the framework-dependent app Now go to the navigation bar and type cmd before the path and hit enter, like in the image below.

Now type dotnet FrameworkDependentApp.dll (or the name of the dll of your project, if youve named it differently) Thats it Youll now see Hello World in the command window as the app output.

What Is Core App For Mac