Task Manager

A Windows process explorer built with WPF on .NET 10: live process list with low-overhead diffing, per-process detail enrichment (path/bitness via native APIs), priority management, settings, and data export (Excel/CSV/JSON/XML/TXT). English and Polish UI.

Solution layout

src/
  TaskManager/           WPF application: views, view models, presentation state
                         (ProcessListCatalog), window orchestration (IWindowService),
                         app services, localization
  TaskManager.Domain/    UI-free core: process snapshots/diff engine, enrichment,
                         OS process operations, exporters, settings model
tests/
  TaskManager.UnitTests/         fast, hermetic test suite (default `dotnet test` target)
  TaskManager.IntegrationTests/  tests against live system state; run explicitly

Dependency rule: only the WPF exe references WPF. Domain depends on the BCL plus NtApiDotNet and ClosedXML.

Build & run

Requires the .NET SDK pinned in global.json.

dotnet build TaskManager.slnx
dotnet run --project src/TaskManager

Test

dotnet test tests/TaskManager.UnitTests          # hermetic suite
dotnet test tests/TaskManager.IntegrationTests   # touches real system state

Logging

Logs go to %LOCALAPPDATA%\TaskManager\logs\tm-yyyyMMdd.log (7-day retention). Writing is asynchronous: entries pass through a bounded in-memory buffer persisted by a background writer; under extreme burst pressure the oldest buffered entries are dropped (one warning line notes each such episode). Pending entries are flushed on normal application exit.

Conventions for new code:

Level	Use for
Debug	hot-path detail (refresh ticks, per-PID operations); guard expensive arguments with IsEnabled
Information	lifecycle milestones and batch outcomes
Warning	recovered failures with context
Error / Critical	failures needing attention; terminal handlers

• Message templates are static literals with named PascalCase placeholders ({Pid}, {ElapsedMs}) — never interpolate values into the string.
• Pass exceptions via the dedicated argument (_logger.LogWarning(ex, "...")), not as placeholders.
• Categories come from ILogger<T> of the owning type.
• LoggerMessage source generation (CA1848) is deliberately deferred.

Disclaimer

This application can interact with and manage Windows processes, including changing process priorities and terminating processes. Terminating or modifying system-critical processes may cause application failures, data loss, system instability, or other unintended behavior.

Use these features with appropriate caution. The author is not responsible for damage, data loss, system instability, or other consequences resulting from the use or misuse of this software.