Dotfuscator generates a mapping file that associates old with new names. The new names of the classes, methods, and fields are shown. Bug tracking becomes difficult after renaming, especially with a high incidence of method overloading, making the map file essential.
The elements of the mapping file are all very similar. A few things are noteworthy:
<newname>element is absent, then the item was not renamed.
.ctor, while static constructors (a.k.a. static initializers, class constructors, etc) are named
.cctor. These are never renamed.
For additional reference, see the governing DTD for the map file.