Red Gate's .NET Reflector lets you browse the contents of DLLs, disassemble them and through various add-ins, do much more. Thanks to "gogobyte", there is a Cobra add-in which will let you view the class declarations and other types in Cobra syntax.

 * http://www.red-gate.com/products/reflector/
 * http://www.gradvarna.com/CobraAddIn.2.zip
 * [http://cobra-language.com/forums/viewtopic.php?f=4&t=254 Discussion Thread]