Blazor is an experimental project. It changes frequently and evolves rapidly. Therefore, it is possible that some content on this website is already outdated.
At the time of writing, the latest version of Blazor is 0.5.1 and a preview of 0.6.0 is available (read more). The Blazor documentation contains a description for how to install the Blazor language services in Visual Studio and the templates for the dotnet CLI.
With the server-side hosting model, WebAssembly is no longer needed on the client as the C# code is executed on the server.