Assemblies can be static or dynamic. Static assemblies can

include .NET Framework types (interfaces and classes), as

well as resources for the assembly (bitmaps, JPEG files,

resource files, and so on). Static assemblies are stored on

disk in PE files. You can also use the .NET Framework to

create dynamic assemblies, which are run directly from

memory and are not saved to disk before execution. You can

save dynamic assemblies to disk after they have executed.