Blazor as "C# running on the client" has had its release date moved to "sometime after .NET Core 3.0.0." But what is definitely coming is .NET Core Version 3.0.0, sometime in the second half of 2019.

SEE: Microsoft's GitHub to developers: New Android app beta lets you do these tasks Developers can test out Mobile Blazor Bindings if they have installed .NET Core 3.0 or 3.1 SDK, Visual Studio ...