What are immutable collections in C#?

What are immutable collections in C#?

Immutable collections in C# are data structures that cannot be modified after they are created. This means once you create an immutable collection, you cannot add, remove, or change its elements.

Why would I use immutable collections instead of regular collections?

Using immutable collections can lead to safer code, as they prevent accidental changes. They are also useful in multi-threaded environments where shared data should not be modified.

Can you give me an example of an immutable collection in C#?

Sure! An example is the ImmutableList<T> class from the System.Collections.Immutable namespace. You can create it like this: var immutableList = ImmutableList.Create(1, 2, 3);.

How do I add an item to an immutable collection?

To add an item, you create a new instance of the collection with the added item. For example: var newList = immutableList.Add(4); This returns a new immutable list with the item added.