ReSharper | Windows | Process Explorer ReSharper_ShowProcessExplorer
Using the ReSharper's Process Explorer window, you can explore current processes and the loaded assemblies. The processes are displayed with the corresponding assemblies and can be sorted and grouped. If necessary, you can show or hide native processes.
Having all the loaded assemblies in view, you can easily find the ones you want to decompile and explore.
Open loaded assemblies
Do one of the following:
Choose ReSharper | Windows | Process Explorer in the main menu.
Expand the process you want to explore and select the desired assemblies.
Click Find Process by Window and then hover the mose over a window, whose process you want to explore: In the tooltip, you could see the PID and the CLR version. and the process is highlighted in the Process Explorer window.
When the desired assemblies are selected, click Add Assembly to Assembly Explorer. The assemblies appear in the Assembly Explorer window and can be decompiled.
If you need to debug some of .NET processes, but there is no PDB for it, you can generate missing PDB right from the Process Explorer. To do so, right-click any .NET process and choose Load Symbols with ReSharper Decompiler. Generation will start immediately to the symbol cache directory specified in Visual Studio options (Tools | Options | Debugging | Symbols). If no directory is specified, ReSharper will suggest to automatically add %LOCALAPPDATA%\Temp\SymbolCache as the cache directory.
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and then hover the mose over a window, whose process you want to explore: 
. The assemblies appear in the Assembly Explorer window and can be decompiled.