Windows Forms Programming in C#

Code Access Security

.NET brings with it a new security model for deployed code. Instead of an assembly getting the permissions of the process running the code, the .NET Code Access Security (CAS) model grants code permissions based on where the code originates.^[2] To view the current permission settings on your machine, use the Microsoft .NET Framework Configuration tool (available in your Administration Tools menu). Drilling into the Permission Sets for the Machine's Runtime Security Policy reveals a number of entries, including FullTrust, LocalIntranet, Internet, and so on. Figure 15.3 shows the set of Internet permissions.

^[2] For a much more detailed discussion of CAS, you'll want to read Essential .NET (Addison-Wesley, 2003), by Don Box, ...