program not running

Warning: 'Program.cs' appears to be a file-based app but was passed as an argument to the project 'C:\Users\User\vscode\myfirstconsoleapp\myfirstconsoleapp.csproj'. To run it as a file-based app, use 'dotnet run --file Program.cs'. To pass it as an application argument, use 'dotnet run -- Program.cs' to suppress this warning.

Reproduce the reported dotnet run invocation with Program.cs and the referenced myfirstconsoleapp.csproj, then trace how the CLI distinguishes file-based apps from application arguments. Done means explaining or correcting the reported behavior so the program runs as intended without the unexpected warning, with a regression test if the repository has one.

Written by the indexing model from the issue text.