If you want to build C# solutions in .NET Core using Visual Studio Code, you might come across these two issues.
Starting from SharePoint Framework v1.6.0, you can have your SharePoint Framework extensions consistently enabled across the different sites in your tenant. And you can add all the necessary deployment information with a single click directly in Visual Studio Code.
Deploy SharePoint Framework solution packages to SharePoint directly from Visual Studio Code!
Using the Rencore Deploy SPFx Package extension you can deploy your SharePoint Framework solution packages to SharePoint Online directly from VSCode.
SharePoint Framework uses JSON files to store project configuration. Here is how you can edit these files easily in Visual Studio Code.