Round 1
1>Delegate are Immutable?
2>Difference between Thread and Task.
3>Multicast delegate.
4>Events are Thread Safe ?
5>Which collection you will use if you want to save unique element ?
6>How HashSet<T> check uniqueness of elemnet
7>IDisposable implementation.
8>Array Vs List
8>Which panel you will use when you want to place your element digonally.
9>Explain ICommand also explain CanExecuteChange
10>Have you work on scenario where UI is getting updated frequently from different source.
Second Round
1>Implement publisher subscriber model without delegate event.
2>Time complexity if you are accessing element in array and List
3>What is use of finally.
4>Have you implemented IEnumerable ?
5>Thread Safe Singleton