In the Microsoft .NET framework, an assembly is a partially compiled code library for use in deployment, versioning and security. An assembly can consist of one or more files. Code files are called modules. An assembly can contain more than one code module and since it is possible to use different languages to create code modules this means that it is technically possible to use several different languages to create an assembly.
When it comes to security, the .NET Code Access Security is based on assemblies and evidence. Evidence can be anything deduced from the assembly, but typically it is created from the source of the assembly, whether the assembly was downloaded from the Internet, an intranet, or installed on the local machine. Check out what the austin .net consultant has to offer about this.
Permissions are applied to entire assemblies, and an assembly can specify the minimum permissions it requires through custom attributes. When the assembly is loaded the CLR will use the evidence for the assembly to create a permission set of one or more code access permissions. The CLR will then check to make sure that this permission set contains the required permissions specified by the assembly.
.NET code can perform a code access security demand. This means that the code will perform some privileged action only if all of the assemblies of all of the methods in the call stack have the specified permission. If one assembly does not have the permission a security exception is thrown. Learn more of this with the austin .net consultant.
The .NET code can also perform Linked Demand for getting the permission from the call stack. In this case the CLR will look for only one method in the call stack in the TOP position has the specified permission. Here the stack walk through is bound to one method in the call stack by which the CLR assumes that all the other methods in the CALL STACK have the specified permission. If you want more information about .NET assemblies, then visit the austin .net consultant for more details.