How to do it...

In most of the previously mentioned text editors, a package manager is included and will be used to install the OmniSharp package:

1. Edit code on macOS with Atom:

1. Let's install the OmniSharp package on Atom:

1. Next, let's create a new project:

1. Now that OmniSharp is installed, we can use the project scaffolding for .NET projects:

1. After choosing Web Application, the project and the associated files are generated.

1. We can see the Startup.cs class generated:

At the bottom of the picture, we can see the OmniSharp features on Atom, with the little green OmniSharp icon on the bottom-left, and two panels: the Errors and Warnings pane and the Omnisharp output pane. The little green icon on the bottom of the page is the OmniSharp icon:

1. Let's type some code; we will see intellisense in action:

1. We can see what appears on the output window while typing:

1. We can also see the errors and warnings in real time:

1. Opening the contextual menu by right-clicking, we can see the OmniSharp menu features: