What are immutable types in C# and how do they work with collections?

What are immutable types in C#?

Immutable types in C# are types whose instances cannot be modified after they are created. Examples include strings and tuples.

Why would I use immutable types?

Using immutable types can help prevent bugs related to unintended changes, improve thread safety, and make your code easier to reason about.

How do immutable types work with collections?

Immutable collections, like ImmutableList or ImmutableDictionary, allow you to create collections that cannot be changed after creation, ensuring data integrity.

Can you give an example of using an immutable collection?

Sure! You can create an ImmutableList like this: var list = ImmutableList.Create(1, 2, 3); and to add an item, you would use list.Add(4) which returns a new list.