To install:
dotnet tool install ilspycmd -g
Help output (ilspycmd ---help):
ilspycmd: 8.0.0.7007
ICSharpCode.Decompiler: 8.0.0.7007
dotnet tool for decompiling .NET assemblies and generating portable PDBs
Usage: ilspycmd [options] <Assembly file name(s)>
Arguments:
Assembly file name(s) The list of assemblies that is being decompiled. This argument is mandatory.
Options:
-v|--version Show version information.
-h|--help Show help information.
-o|--outputdir <directory> The output directory, if omitted decompiler output is written to standard out.
-p|--project Decompile assembly as compilable project. This requires the output directory option.
-t|--type <type-name> The fully qualified name of the type to decompile.
-il|--ilcode Show IL code.
--il-sequence-points Show IL with sequence points. Implies -il.
-genpdb|--generate-pdb Generate PDB.
-usepdb|--use-varnames-from-pdb Use variable names from PDB.
-l|--list <entity-type(s)> Lists all entities of the specified type(s). Valid types: c(lass), i(nterface),
s(truct), d(elegate), e(num)
-lv|--languageversion <version> C# Language version: CSharp1, CSharp2, CSharp3, CSharp4, CSharp5, CSharp6, CSharp7_0,
CSharp7_1, CSharp7_2, CSharp7_3, CSharp8_0, CSharp9_0, CSharp_10_0 or Latest
-r|--referencepath <path> Path to a directory containing dependencies of the assembly that is being decompiled.
--no-dead-code Remove dead code.
--no-dead-stores Remove dead stores.
-d|--dump-package Dump package assembiles into a folder. This requires the output directory option.
--nested-directories Use nested directories for namespaces.
Remarks:
-o is valid with every option and required when using -p.
Examples:
Decompile assembly to console out.
ilspycmd sample.dll
Decompile assembly to destination directory (single C# file).
ilspycmd -o c:\decompiled sample.dll
Decompile assembly to destination directory, create a project file, one source file per type.
ilspycmd -p -o c:\decompiled sample.dll
Decompile assembly to destination directory, create a project file, one source file per type,
into nicely nested directories.
ilspycmd --nested-directories -p -o c:\decompiled sample.dll