Assemblies are fundamental building blocks of .Net Framework. They contain the type and resources that are useful to make an application. Assemblies enables code reuse, version control, security and deployment. An assembly consists of: Manifest, Type Metadata, MSIL and resource file.
Assemblies are Private and Shared. Private are used for a single application and installed in application’s install directory or its sub-directory. Shared assembly is one that can be referenced by multiple application and resides in GAC(local cache for assemblies managed by .Net Framework).
gacutil /i myDll.dll can see and %windir%\assembly
