A month ago, I demonstrated how to migrate your ASP.NET 5 beta project to Core RC2. The migration from Beta to RC2 was a bit long but pretty much easy to follow, and I was able to run my prototype apps smoothly without any hiccups. Recently, ASP.NET Core RTM was out. Microsoft announced the release of ASP.NET Core 1.0 couple of days ago. Big thanks to Microsoft and to the .NET Core team for their utmost effort on making this final release.

In this article, we’re going to look at how to upgrade our existing ASP.NET Core RC2 App to RTM in Windows environment using Visual Studio 2015.

Installation Requirements

First thing you need is to download Visual Studio 2015 Update 3. You can check the release update here.
Second is download the Microsoft .NET Core 1.0.0 VS 2015 Tooling Preview 2.
Installing Visual Studio 2015 Update 3

Note: You may need to uninstall the RC2 bits (Update 2) before installing the RTM bits (Update 3).

You may need to close all instances of Visual Studio that are running on your machine before installing Visual Studio Update 3 (vs2015.3). Now if you are getting the following setup warning below:

rtm1

Figure 1: Setup Warning
Don’t panic. Just click Continue and it should bring you to the next step below:

Figure 2: Features
Select the features that you would like to be included for this update and then click “Next”. Verify all the features you need in the next step and then click “Update” to start applying the changes.

You may need to wait for a few minutes or a few hours depending on your connection before it completes the upgrade. Once completed, you should be able to see the following figure below:

Figure 3: Setup Completed
After the installation, make sure to restart your machine to ensure updates will take effect.

Installing .NET Core 1.0.0 VS Tooling Preview 2

Now install the Tooling Preview 2 that you have just downloaded. You should see something like this as the installation progress:

Figure 4: VS 2015 Tooling Preview 2 installation
Once the installation is complete, then you should be able to see something like this:

Figure 5: VS 2015 Tooling Preview 2 installation completed
Upgrading to RTM

In this demo, I’m going to use the ASP.NET Core MVC project that I’ve demonstrated before. Now let’s start modifying.

Note: You may need to run Visual Studio as administrator to make sure that restoring of NuGet packages will run smoothly.

project.json changes

The fastest trick to upgrade is to create new project and compare your existing “project.json” file with the new project.

Looking at the newly created ASP.NET Core Web Application project, it seems that we only need to change:

  • The Microsoft.NETCore.App version from 1.0.0-rc2-3002702 to 1.0.0
  • All references from 1.0.0-rc2-final to 1.0.0
  • All references from 1.0.0-preview1-final to 1.0.0-preview2-final
  • Remove the imports section under the tools element. So your tools element would now look like this:
So doing a quick find and replace will easily do the sync for you.

global.json changes

You need to update SDK version to 1.0.0-preview2-003121. So your file should now have this:

Wrapping Up

Here’s how my project.json file looked like after the modification:

Output

That’s it! Unlike previous versions, it seems that upgrading to RTM is painless. Here’s the output of my ASP.NET Core MVC app after the upgrade:

Capture7

Figure 6: Output
If you are still working on Beta versions and wanted to migrate your project to RTM, then I would really recommend you to create a fresh project instead and move your code to the new project created. That way, there’s less chance for you to get migration configuration errors.


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Upgrading ASP.NET Core 1.0 RC2 Project to RTM