What is a .NET application domain?

Question

In particular, what are the implications of running code in two different application domains?

How is data normally passed across the application domain boundary? I

Answer 1

It is an isolation layer provided by the .NET runtime. As such, App domains live with in a process (1 process can have many app domains) and have their own virtual address space.

App domains are useful because:

• They are less expensive than full processes
• They are multithreaded
• You can stop one without killing everything in the process
• Segregation of resources/config/etc
• Each app domain runs on its own security level