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  • Introducing JetBrains dotPeek

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dotPeek decompiles any .NET assemblies and presents them as C# code. Both libraries (.dll) and applications (.exe) can be opened with File > Open assembly.
In addition, assemblies from GlobaL Assembly Cache can be opened via File > Open from GAC. One thing to note about the Open from GAC dialog is that you can batch-select assembly items there, and you can also filter out assemblies by entering their CamelHumps - the capitals that different parts of assembly names start with. for example, to find all assemblies with names containing Microsoft.VisualStudio.Modeling in the list of GAC assemblies, you can type mvsm:

CamelHumps support is a significant concept that also spans multiple navigation feautres of dotPeek that are highlighted below.
dotPeek provides an assembly explorer to traverse the list of opened assemblies. Expanding an assembly node lists namespaces within the assembly that can be further expanded to types and type members, as well as assembly references. Note that the assembly explorer uses the same set of icons that we're used to in Visual Studio for member identification.

Clicking a reference loads the referenced assembly, if immediately available. Clicking a type or type member displays decompiled code in the source code view area.

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Another noticeable ReSharper-like feature gets handy when you want to select a part of decompiled code, and is called Extend/Shrink Selection. Using a dedicated shortcut (by default, Ctrl+W) lets you successively select expanding blocks of code, starting from a substring of a symbol, on to a statement, line, code block, and all the way to the entire file. A pair shortcut (Ctrl+Shift+W) works the opposite way, successively narrowing a selection. Read more about this functionality as it is implemented in ReSharper.

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When you explore decompiled code, you may be willing to learn more about referenced types and method calls without opening their declarations. Two coding assistance features from ReSharper will help you with that: Parameter Info (Edit > Parameter Information) on a method call will display all available signatures of the given method, and Quick Documentation (Edit > Show Quick Documentation) on a usage of a type, method, property, or another type member will display an overview of its documentation comments:

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  • Same tabbed tool windows as those in ReSharper (different to the actual Tool Windows that exist). Same feel. All tool windows have collapse, expand, filtering and other features available in ReSharper, as well as possibility of tabs.
  • Extend/shrink selection
  • Find Usages: The ability to see easily all the places where a type is used. This is similar to the Used By in REflector..

Navigation and Search

The primary idea behind dotPeek is to bring ReSharper experience to browsing external assemblies and make this available to everyone. That essentially means that the The main thing that distinguishes dotPeek from other decompiler decompilers around is that the majority of ReSharper navigation features from ReSharper are available in dotPeek as well. Let's take a closer look at those:

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Navigating decompiled code

  • Context-insensitive navigation (go to symbol/file/type/file member)...
  • Context-sensitive navigation (go to declaration/base/inheritor/implementation)..
  • Tool windows (File Structure, Type Hierarchy)..
  • Navigate between tool windows (from code view to assembly explorer)

Searching in decompiled code

  • Find usages
  • Highlight usages in file
  • Find usages advanced
  • Quick Find

Other features

  • External Sources (Need confirmation from Ilya is this is allowed to be talked about)
  • Same Extensibility Model that of ReSharper in terms of plug-in development. You can develop plug-ins for dotPeek in the same way you can for ReSharper.