The Common Language Runtime (CLR) differentiates an assembly from a satellite assembly by an attribute called the "AssemblyCultureAttribute". A regular assembly contains code and the neutral culture's resources. A satellite assembly contains only resources for a particular culture, as in [assembly: AssemblyCultureAttribute ("en-US")]. Putting this attribute on an assembly and using something other than the empty string ("") for the culture name will make this assembly a satellite assembly rather than a regular assembly that contains executable code. Labeling a traditional code library with this attribute will break it, because no other code will be able to find the library's entry points at runtime. We have a culture attribute in the Global Assembly Cache (GAC). If we open it and see, we find that it does not have a value for a normal assembly and has the culture name shown for the satellite assembly. This can be stated as the vital difference between an assembly and a satellite assembly.