DnSpy DLL

GitHub address:

introduce

dnSpy is a tool for decompiling DLL and .NET files. You can use this to decompile an assembly even if you don't have any source code available. It comes with official Chinese, and it’s very lightweight.

The following pictures show dnSpy in action. It shows dnSpy editing and debugging .NET EXE files, not the source code.

Function

Debug .NET Framework, .NET Core and Unity game assemblies without source code

Edit the assembly directly in C# or Visual Basic or IL and edit all metadata

Light and dark themes optional

Extensible, write your own extensions

High DPI support (per monitor DPI aware)

and more

Decompile

Debug .NET Framework, .NET Core and Unity game assemblies without source code

Set breakpoints and step into any assembly

locals, watches, car windows

Variables window supports saving variables (e.g. decrypted byte arrays) to disk or viewing them in a hex editor (memory window)

Object ID

Multiple processes can be debugged simultaneously

Break module load

Tracepoints and conditional breakpoints

Export/import breakpoints and tracepoints

Call stack, thread, module, process window

Breaking the exception thrown (first chance)

Variables window supports evaluating C#/Visual Basic expressions

It is possible to debug dynamic modules (but not dynamic methods due to CLR limitations)

The output window logs various debugging events and displays timestamps by default :)

It is possible to debug your own assembly at runtime and dnSpy will use the in-memory image. You can also force dnSpy to always use an in-memory image instead of a disk file.

Public API you can write extensions or use the C# Interactive window to control the debugger

How to use:

Unzip it anywhere and run the DnSpy.exe file

Source code:

• * *

other

**Assembly Editor**

• All metadata can be edited

• Edit methods and classes in C# or Visual Basic with IntelliSense, no source code required

• Add new methods, classes or members in C# or Visual Basic

• IL editor for low level IL method body editing

• Low level metadata tables can be edited. This uses the hex editor internally.

**Hex Editor**

• Click on an address in the decompiled code to go to its IL code in the hex editor

• Reverse of above, press F12 in an IL body in the hex editor to go to the decompiled code or other high level representation of the bits. It's great to find out which statement a patch modified.

• Highlights.NET metadata structures and PE structures

• Tooltips shows more info about the selected.NET metadata / PE field

• Go to position, file, RVA

• Go to.NET metadata token, method body, #Blob / #Strings / #US heap offset or #GUID heap index

• Follow references (Ctrl+F12)

**Other**

• BAML decompiler

• Blue, light and dark themes (and a dark high contrast theme)

• Bookmarks

• C# Interactive window can be used to script dnSpy

• Search assemblies for classes, methods, strings etc

• Analyze class and method usage, find callers etc

• Multiple tabs and tab groups

• References are highlighted, use Tab / Shift+Tab to move to next reference

• Go to entry point and module initializer commands

• Go to metadata token or metadata row commands

• Code tooltips (C# and Visual Basic)

• Export to project

**List of other open source libraries used by dnSpy**

• ILSpy decompiler engine (C# and Visual Basic decompilers)

• Roslyn (C# and Visual Basic compilers)

• dnlib (.NET metadata reader/writer which can also read obfuscated assemblies)

• VS MEF (Faster MEF equals faster startup)

• ClrMD (Access to lower level debugging info not provided by the CorDebug API)

**Translating dnSpy**

Click here if you want to help with translating dnSpy to your native language.

**Wiki**

See the Wiki for build instructions and other documentation.

**License**

dnSpy is licensed under GPLv3.

Credits

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Update log

As of today, one full year has passed since the v6.1.9 release and I'm proud to announce that the v6.2.0 update …