What is the foreach loop in C#?

Can you explain how the foreach loop works in C#?

Sure! The foreach loop in C# is used to iterate over a collection, such as an array or a list, without needing an index.

Can you give me an example of using foreach with an array?

Of course! Here's a simple example:

int[] numbers = { 1, 2, 3, 4, 5 };
foreach (int number in numbers) {
    Console.WriteLine(number);
}

What happens if I try to modify the collection inside the foreach loop?

Modifying the collection while iterating through it with foreach will throw an InvalidOperationException. It's best to avoid that.

Are there any performance considerations when using foreach?

Yes, foreach can be less efficient than a for loop in some cases, especially with large collections, due to iterator overhead.