Visual Studio Code Setup for C# and .NET
This is assuming that you already have VS Code installed. At the time of this writing I’m on version 1.45. The next two don’t affect each other, so you can install them in either order. You want the C# extension and the .NET Core SDK.
After these are installed, I personally have been installing an extension pack called .NET Core Extension Pack. Like most extension packs I should probably look into each of the extensions more than I do.