Oqtane uses Blazor, a new web framework for .NET Core that lets you build interactive web UIs using C# instead of JavaScript. Blazor apps are composed of reusable web UI components implemented using C#, HTML, and CSS. Both client and server code is written in C#, allowing you to share code and libraries.

To get started with Oqtane:

1. Install the latest preview of Visual Studio 2019 with the ASP.NET and web development workload.

2. Install the latest Blazor extension from the Visual Studio Marketplace. This step makes Blazor templates available to Visual Studio.

3. Enable Visual Studio to use preview SDKs: Open Tools > Options in the menu bar. Open the Projects and Solutions node. Open the .NET Core tab. Check the box for Use previews of the .NET Core SDK. Select OK.

4. Open the Oqtane.sln solution file. If you want to develop using server-side Blazor ( which includes a full debugging experience in Visual Studio ) you should choose to Build the solution using the default Debug configuration. If you want to develop using client-side Blazor ( WebAssembly ) you should first choose the "Wasm" configuration option in the Visual Studio toolbar and then Build.