What are the differences between List, Array, and Dictionary in C#?

What are the differences between List, Array, and Dictionary in C#?

In C#, a List is a dynamic collection that can grow in size, an Array is a fixed-size collection, and a Dictionary is a key-value pair collection. Would you like to know more about their specific use cases?

Yes, can you explain when to use each type?

Sure! Use an Array when you know the number of elements in advance. Use a List for dynamic collections where you might add or remove items. Use a Dictionary when you need to associate keys with values for quick lookups.

What are the performance differences between them?

Arrays have the best performance for fixed-size collections. Lists have slightly more overhead due to dynamic resizing, while Dictionaries offer fast lookups but can be slower for insertion and deletion due to hashing.

Can you give me a code example for each?

Absolutely! Here's a quick example:

1. Array: int[] numbers = new int[5];
2. List: List<int> numberList = new List<int>();
3. Dictionary: Dictionary<string, int> ageDictionary = new Dictionary<string, int>();