Fuzebox Interview questions

https://www.fuzebox.com/

Focus was more on WinForm and multi-threading.

1) IDictionary interface
2) How do you use Assemblies Win32 API's in C# code ?
3) How to make your class not accessible to other class ?
4) Difference between interface and abstract classes
5) Difference between finalize() and dispose()
6) How do you use unmanaged code in your application ?
7) Have you written any C++ code recently ?
8) What are collections ? Difference between Arraylist and Array.
9) How will you resize WinForm with all form elements in it ?
10) Have you used any design patterns (Observer, Observable, etc.)
11) How will you call DLL's in your C# code ?
12) What is DLL Hell problem ?