C# Tooling & Runtime.

The build, the packages and the runtime a C# program is shipped on. Covers 10 topics.

• C# Tooling & Runtime · 1 of 3

  Tests

  In xUnit, how many test cases does a [Theory] method produce when it carries several data attributes?

  AOne case for the whole methodBOne case per [InlineData] rowCOne case per assertion it makesDOne case per method parameter

• C# Tooling & Runtime · 2 of 3

  The command line

  In a folder that holds a .csproj, dotnet frobnicate runs on SDK 10.0.401, and no tool with that name is installed. What happens?

  AIt passes the word frobnicate to the built program as an argumentBIt builds the project, then reports the unknown commandCIt reports the command or file was not found, exit code 1DIt downloads a NuGet tool named frobnicate, then runs it

• C# Tooling & Runtime · 3 of 3

  Publishing

  This .NET 10 program is published with dotnet publish -r osx-arm64 -p:PublishTrimmed=true. The publish succeeds with two IL2026 warnings. What do those warnings establish?

  using System.Text.Json;Console.WriteLine(JsonSerializer.Serialize(new { X = 1, Y = 2 }));

  Athat the whole program is safe to trim because publish succeededBthat all reachable code is safe to trim, flagged calls includedCthat the trimmer kept the types those calls need, so they workDonly that the analyzer flagged calls it cannot prove trim-safe