Omnisharp server is not running Windows 10

Question

I'm using VS Code to try out ASP.NET a little bit, but when I try to do: dnu restore it fails.

If I try to do it within VS Code I get a error message: Omnisharp server not running.

I don't really know what to do :( I'm running Windows 10 x64

Answer 1

Check the vs code Omnisharp log, Ctrl + Shift + U.

The Omnisharp server is not running error can result from a problem in your project.json causing issues with dnu restore. e.g. Issues resolving packages for one of the target frameworks?

It probably will not help but, you can try restarting Omnisharp : F1 "omni restart"

C# support is not bundled but it does sound like you have successfully installed it. Otherwise add C# with F1 "ext install", Enter, "C#"

You are right that there is little documentation

• https://code.visualstudio.com/docs/languages/csharp - introduction to project types and omnisharp
  
• https://docs.asp.net/en/latest/tutorials/your-first-mac-aspnet.html - yes OSX because windows instructions are for Visual Studio (page no longer available)
• https://blogs.msdn.microsoft.com/visualstudioalm/2016/03/10/experimental-net-core-debugging-in-vs-code/ - expect better soon

Answer 2

Visual Studio Code has Omnisharp built in. However, that doesn't mean you don't have to install ASP.NET 5 and DNX.

Follow the instructions found on this guide: https://code.visualstudio.com/Docs/runtimes/ASPnet5

Specifically, you'll want to follow these instructions: https://github.com/aspnet/home#upgrading-dnvm-or-running-without-visual-studio

Remember, Visual Studio is the heavyweight IDE that installs all that you need. Visual Studio Code is the lightweight node based editor that only has what you explicitly install/add to it. Thus, unlike Visual Studio, it does not automagically download ASP.NET 5 and DNX