What is GAC ?
Answer:
Twist :- What are situations when you register .NET assembly in GAC ?
GAC (Global Assembly Cache) is used where shared .NET assembly reside.GAC is used in the
following situations :-
  • If the application has to be shared among several application.
  • If the assembly has some special security requirements like only administratorscan remove the assembly.If the assembly is private then a simple delete ofassembly the assembly file will remove the assembly.
Note :- Registering .NET assembly in GAC can lead to the old problem of DLL hell.
Where COM version was stored in central registry.So GAC should be used when
absolutely necessary