Create a .NET TaskHost so that .NET Framework MSBuild can consume .NET Tasks

[rainersigwald]

Task declaration supports a Runtime attribute that allows MSBuild-running-on-.NET-4 to call tasks that support only .NET 3.5 (by spawning an MSBuildTaskHost.exe that runs on .NET 3.5 and communicates with the rest of the build via IPC).

Similar support could be used to support running .NET Core (or .NET Standard 2.1+) tasks from Visual Studio with Runtime="NET" (or something like that).

[teo-tsirpanis]

A more immediate solution would be to allow Visual Studio to run the entire build on .NET Core.

That could be complemented by failing if .NET Framework-based MSBuild attempted to run a task marked with Runtime="Core".

[john-larson]

Is this on the roadmap?