dotnet-inspect-decompiler

dotnet-inspect: decompiler and IL

Use this skill to understand how code actually works from the assembly you have. The decompiler is local and always available (no network), and the IL and annotated views can reveal more than the original source. For the authoritative original source as written by the author, use the sourcelink skill.

dnx dotnet-inspect -y -- <command>

Decompiled source and IL

A selected overload defaults to Signature; bare -S adds Decompiled Source. Use -S @Source for the full local evidence set (it also pulls Original Source when SourceLink is available — see the sourcelink skill):

• Decompiled Source — raised, lowered C# (readable best-effort).
• Annotated Source — C# with hidden-fact comments and interleaved IL.
• IL — raw IL, the highest-fidelity view.

Use Annotated Source or IL when exact opcodes, offsets, branches, tokens, or calls matter. Use --bare for a whole-type listing. --project reads existing restored assets; restore/build first if dependencies changed.

dnx dotnet-inspect -y -- member JsonSerializer --platform System.Text.Json Serialize:1 -S @Source
dnx dotnet-inspect -y -- member JsonSerializer --platform System.Text.Json Serialize:1 -S "Annotated Source"
dnx dotnet-inspect -y -- type JsonSerializer --platform System.Text.Json -S "Decompiled Source" --bare
dnx dotnet-inspect -y -- member Command --project ./src/App Add:1 -S @Source

Fidelity model

The decompiler degrades honestly: IL with no faithful C# spelling renders as a visible comment and lowers the result's fidelity level (Full -> Partial -> StructuredOnly -> IlOnly -> Failed) instead of emitting plausible-but-wrong source, with a stable DEC#### diagnostic on every degradation. Decompiled Source is lowered C#; raw/annotated IL is highest fidelity.

If decompiled output looks wrong, capture Decompiled Source, Annotated Source, Original Source (via the sourcelink skill), and IL together; maintainers diagnose pipeline state with DecompilerHarness.

Select Fidelity Causes for the typed DEC#### cause census behind that fidelity grade. It distinguishes a Full method (complete, no causes), a method without a body (absent), and a failed inspection.

dnx dotnet-inspect -y -- member MyType MyMethod:1 --library MyLib.dll -S "Fidelity Causes"

Locate code by IL offset

dnx dotnet-inspect -y -- library Foo --il-offset 0x06000001+0x5

Use library Foo --il-offset 0x06000001+0x5 (MethodDef token plus IL offset) to map a crash location back to the method and source. For call edges (what a method calls, who calls it), see the relationships skill.