An Application Domain is a light-weight process. It is a logical and physical unit of isolation built around every .NET application by the Common Language Runtime (CLR) and contains its own set of code, data and configuration settings. Multiple application domains can exist simultaneously in the same process. The default application domain is created when the Common Language Runtime is first loaded into a process. From then on, the CLR loads an assembly implicitly into an Application Domain the first time it encounters and references a type in the MSIL code. Assemblies can also be created explicitly loaded in Application Domains. This a..
