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With mono you'd compile and run C# code by doing csc test.cs && mono test.exe. How would you do it with the official .NET SDK on Ubuntu?

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    dotnet build Commented May 31, 2021 at 22:24
  • Have you looked through the docs you linked to? There's a "Hello World" example that spells it out: learn.microsoft.com/en-us/dotnet/core/get-started and learn.microsoft.com/en-us/dotnet/core/deploying/deploy-with-cli Commented Jun 1, 2021 at 0:01
  • @GuruStron - when I try dotnet build test.cs I get /home/neubert/test.cs(1,1): error MSB4025: The project file could not be loaded. Data at the root level is invalid. Line 1, position 1.. I guess compiling individual *.cs files isn't possible with dotnet per stackoverflow.com/a/47697996/569976... Commented Jun 2, 2021 at 2:24
  • Maybe this can help? Commented Jun 2, 2021 at 13:02
  • @GuruStron - yah - that was in the link I posted. But the proposed remediation is ~300 bytes long whereas csc test.cs isn't anywhere close. I can memorize csc filename.ext - I'm not going to memorize that other one. I suppose I could alias it but idk that feels like too much effort lol Commented Jun 2, 2021 at 15:43

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Depending on what your goal is:

  • dotnet run - This will build and run your application directly
  • dotnet test - This will build everything and run your unit tests
  • dotnet publish - This will build your application for deployment
  • dotnet build - This will build your application (for development only). Generally, you don' want to use this: one of the others on this list will be a better way to do what you want. If you want to share this with users, you want dotnet publish instead.
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When I try dotnet build test.cs I get /home/neubert/test.cs(1,1): error MSB4025: The project file could not be loaded. Data at the root level is invalid. Line 1, position 1.. I guess compiling individual *.cs files isn't possible with dotnet per stackoverflow.com/a/47697996/569976. Oh well...
The recent versions of .NET don't support compiling/running single files. They expect you to be using a project. There's currently an active proposal for enabling single file programs that you can execute directly - similar to running a shell script - but that's just in the design phase right now.

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