dotnet restore app.cs

[RikkiGibson]

The vscode tooling appears to run a restore by digging up the SDK associated with the current project and running dotnet restore <project> in a subprocess. (I'll try to dig up the source code for this when I get a chance.)

So, the most expedient way for us to do restore in the editor, is likely going to be to support that command for file-based programs as well.

Possibly dotnet restore <project> is just an alias for dotnet build <project> -t:Restore, which would give us a straightforward workaround.

[RikkiGibson]

@jjonescz for visibility

[jjonescz]

Note that currently dotnet build and dotnet restore forward all their arguments to msbuild.exe. Since we are building in memory using MSBuild APIs (and there is no API to convert from MSBuild command line args to some options we could pass to the APIs AFAIK), build/restore support for file-based programs will likely miss support for many MSBuild arguments (except for common ones like -property which dotnet run also supports).

Although it looks like build/restore commands forward msbuild flags via their "SlnOrProjectArgument" (which gets all unrecognized arguments), so it looks like unofficial/undocumented/unintended behavior anyway.