dotPeek can decompile any .NET assemblies into equivalent C# code and optionally show the underlying IL code.

Decompile .NET assemblies to C# or IL

dotPeek can decompile any .NET assemblies into equivalent C# code and optionally show the underlying IL code.

Libraries, executables and more

dotPeek can work with a variety of formats, such as libraries (.dll), executables (.exe), and metadata files (.winmd).

dotPeek can also decompile .baml files, enabling you to reconstruct XAML UI definitions.

In addition to traditional assemblies and executables, you can have dotPeek open archives (including .zip, .vsix, and
.nupkg formats) and folders. For example, when you point dotPeek at a folder, it processes all its subfolders in hunt
for files that it can decompile.

View source code if available

Decompiled code is better than nothing but sometimes you can match an assembly to its source code, so why not take
advantage of this? dotPeek can identify local source code based on PDB files, or fetch source code from source servers
such as Microsoft Reference Source Center or Moreover, dotPeek can generate PDB files.

View source code if available

Use the navigation mode drop-down in the menu bar to choose whether you only want dotPeek to decompile assemblies,
or try find source code if possible.

Show or hide compiler-generated code

You can choose to turn off certain compiler transformations, thus making code structure that dotPeek displays very similar
to what the compiler turns it to. This helps see how compiler deals with lambdas, closures, and auto-properties, among
other things.

Explore running processes

The Process Explorer window shows the list of all currently running processes and allows exploring their modules and
decompiling those of them that are .NET assemblies. Once you locate a process to decompile, you can add it to Assembly
for further investigation.

Process Explorer window in dotPeek

View IL code whenever necessary

Whenever you want to dive deeper than source code, you can navigate to IL code from any point in decompiled C#.

Choose to view IL code from the context menu

IL code can be shown in a separate tool window that is synchronized with the main code viewer:

Also, you can opt to show IL code as comments to decompiled C# code, which effectively merges its default text viewer
and the normally separate IL Viewer window, all in one view.

IL code shown as comments to C# code

dotPeek can display IL code both for decompiled code and for source code reproduced from symbol files.

Navigate decompiled code in different ways

As dotPeek is based on ReSharper's powerful code insight architecture, it lets you navigate decompiled assemblies in a
contextual or context-insensitive ways, get a quick summary what's inside each decompiled file, set bookmarks and
explore inheritance chains.

Find usages of any symbol

With dotPeek, you have several options to search where code symbols are referenced.

Specifically, Find Usages displays all usages of a symbol (method, property, local variable etc.) in the Find Results tool
window where you can group them, navigate between them, and open in the code view area.

Find Results lists all found usages of a symbol

There's also Find Usages Advanced, which is a more detailed version of Find Usages that helps you fine-tune search
criteria by limiting the scope of search and other characteristics.

Finally, Highlight Usages in File puts highlighting on usages of a symbol in the current file, depending on whether
it's a write or read usage:

Highlight usages in file

Explore current class

Use Go to File Member for a quick overview of and navigation to members of a file representing a decompiled type.
Enter parts of member names, and navigate directly to them:

Go to file member

Alternatively, if you'd like a static display of members in the current file, open and dock the File Structure tool window:

File Structure window

Jump to any code

By indexing all assemblies in your assembly list, as well as all their references, dotPeek provides two features to quickly
jump to specific code:

  • Go to Symbol helps navigate to a specific symbol declaration, which could be a type, method, field, or property. Use
    lowerCamelHumps syntax to locate types — for example, enter xmard to locate and open XamlMarkupDeclaredElement.
  • Go to Everything allows searching for an assembly, namespace, type, member, or a recently opened file.
Go to Everything to jump to specific types, files, members etc.

Set bookmarks

If there are lines of decompiled code that you feel are important and you want to go back to them later, feel free to set

Go to file member

Navigate class hierarchies

If you're interested to navigate up and down an inheritance hierarchy from a specific type or type member,
consider using Go to Base Symbols and Go to Derived Symbols.

These are extremely useful when you want to go to an inheritor or a base symbol right away.

Go to derived types

Navigate contextually

Whenever you put a caret on a symbol in the code view area, dotPeek offers a plethora of contextual navigation
options that are all available via Navigate To drop-down menu:

Context-sensitive navigation options

For example, Go to Declaration takes you from a usage of any symbol to its declaration. If the symbol is declared on
another assembly, the assembly is loaded automatically.

Go to Implementation helps navigate to end implementations of types and type members, bypassing intermediate
inheritance steps in the inheritance chain, such as abstract classes.

Go to implementation

Other useful contextual navigation options include Go to Base Symbols and Go to Extension Methods.

Explore inheritance chains

If you're looking to get a visual summary of a certain inheritance chain, use Type Hierarchy.

dotPeek will show you all types that are inherited from the selected type, as well as types that it inherits itself —
as a tree view, in a separate tool window:

Type Hierarchy view

Make sense of assemblies

dotPeek provides a way to quickly grasp the structure of any given assembly, as well as ways to organize assemblies
into discrete lists, which helps only focus on assemblies that you're interested for your current assignment.

Manage assembly lists

You can work with different assembly lists depending on your context. You can save and reopen assembly lists, and
clear the current list if you no longer need it. Assembly lists are not limited to .dll and .exe files: they can also contain
archives and folders.

dotPeek helps you browse folders, archives, and NuGet packages

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