C# (.NET)

Debugger: netcoredbg (Samsung, MIT license) Status: Stable .NET version: .NET Core 3.1+ / .NET 5+

Prerequisites

Download and install netcoredbg from the releases page and place the netcoredbg binary in your PATH.

Verify: netcoredbg --version

Quick Start

# Debug a .NET program
krometrail launch "dotnet run" --break Program.cs:42

# Debug with a specific project
krometrail launch "dotnet run --project src/MyApp" --break src/MyApp/OrderService.cs:147

# Debug tests
krometrail launch "dotnet test" --break src/MyApp/OrderService.cs:147

# Debug a specific test
krometrail launch "dotnet test --filter OrderServiceTests.TestGoldDiscount" \
	--break src/MyApp/OrderService.cs:147

Conditional Breakpoints

C# expressions work directly in conditions:

krometrail break "OrderService.cs:147 when discount < 0"
krometrail break "OrderService.cs:147 when user.Tier == \"Gold\""

Inspecting .NET Objects

The viewport renders .NET objects using their property values:

Locals:
  discount  = -149.97
  order     = Order { Id=482, Total=149.97, Tier=Gold }
  items     = List(3): [Item { Price=49.99, Qty=3 }, ...]
  result    = null

Tips

• Build with debug configuration (dotnet build without --configuration Release) to include debug symbols
• For ASP.NET Core: launch with dotnet run — the adapter handles attaching before requests are served
• debug_evaluate accepts C# expressions including LINQ queries
• netcoredbg is open-source (MIT) and does not require a Visual Studio license