What are advanced collections in C# and how can I use them?

What are advanced collections in C# and how can I use them?

Advanced collections in C# include types like Dictionary, HashSet, and List. They offer more functionality than basic arrays.

Can you explain how a Dictionary works?

A Dictionary in C# is a collection of key-value pairs. You can quickly look up values based on their keys.

What are the benefits of using a HashSet?

A HashSet is great for storing unique items and provides fast lookups, making it efficient for operations like checking membership.

How do I iterate through a List?

You can use a foreach loop to iterate through a List. For example: foreach(var item in myList) { // process item }.

Are there any performance considerations I should be aware of?

Yes, different collections have different performance characteristics. For example, accessing an item in a List is O(1), while in a Dictionary it's also O(1), but inserting in a List is O(n) if resizing is needed.