The samples in this directory are for ASP.NET Core Blazor, an experimental .NET web framework using C#/Razor and HTML that runs in the browser with WebAssembly.
To learn more about Blazor, please see documentation on its repo.
Please note that if you want to open Blazor projects in Visual Studio, you must have Visual Studio 15.7 Preview 1 or later. You cannot open or build these projects in VS 15.6 or earlier.