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Single-File and Multifile Assemblies

Technically speaking, an assembly can be composed of multiple modules. A module is really noth-

ing more than a generic term for a valid .NET binary file. In most situations, an assembly is in fact

composed of a single module. In this case, there is a one-to-one correspondence between the (logi-

cal) assembly and the underlying (physical) binary (hence the term

single-file assembly).

Single-file assemblies contain all of the necessary elements (header information, CIL code,

type metadata, manifest, and required resources) in a single *.exe or *.dll package. Figure 15-4

illustrates the composition of a single-file assembly.

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