ReSharper 8.0 Web Help

The Navigate to Assembly Explorer feature is available in decompiled sources and gives you a convenient way to examine a library type. Using the Assembly Explorer window you can explore library types, their members, base types, inheritors, etc.

Place the caret at the type you are interested in, press Ctrl+Shift+GAlt+~, then click Locate in Assembly Explorer.
The Assembly Explorer window opens and the desired type are highlighted.