You MUST have a .vsproj project file in your current working directory in order for the visual basic dotnet compiler to work correctly. The available options for the visual basic dotnet compiler are

• Dotnet build and run
• Dotnet build

As you can see we don't offer the usual compilation options build & run, build, run, and build solution for visual basic dotnet. They can't be implemented because dotnet is extremely privative in how they let their users compile. This might change in the future.

In the meantime use .vbproj files instead of .solution.toml files in your visual basic dotnet projects.