IList vs IEnumerable for Collections on Entities

by

IEnumerable<T> represents a series of items that you can iterate over (using foreach, for example), whereas IList<T> is a collection that you can add to or remove from.

Typically you’ll want to be able to modify an Order by adding or removing OrderLines to it, so you probably want Order.Lines to be an IList<OrderLine>.

Having said that, there are some framework design decisions you should make. For example, should it be possible to add the same instance of OrderLine to two different orders? Probably not. So given that you’ll want to be able to validate whether an OrderLine should be added to the order, you may indeed want to surface the Lines property as only an IEnumerable<OrderLine>, and provide Add(OrderLine) and Remove(OrderLine) methods which can handle that validation.

More Related Contents:

  1. what is difference between mutable and immutable property of collection in kotlin
  2. Size-limited queue that holds last N elements in Java
  3. count vs length vs size in a collection
  4. MongoDB query multiple collections at once
  5. ReadOnlyCollection or IEnumerable for exposing member collections?
  6. How to check if IEnumerable is null or empty?
  7. How can I have a collection of objects that differ by their associated type?
  8. Counter in Collections module Python
  9. Clone a List, Map or Set in Dart
  10. Recreating a Dictionary from an IEnumerable
  11. In what conditions does powershell unroll items in the pipeline?
  12. IEnumerable and order
  13. Publishing/subscribing multiple subsets of the same server collection
  14. IEnumerable as return type
  15. How to convert/transform a collection to another collection by element’s property?
  16. How do I remove repeated elements from ArrayList?
  17. Sorting an ArrayList of objects using a custom sorting order
  18. HashSet vs. List performance
  19. How to convert a Map to List in Java?
  20. Most efficient way to increment a Map value in Java
  21. How do I apply the enrich-my-library pattern to Scala collections?
  22. Lambda expression to convert array/List of String to array/List of Integers
  23. Combine multiple Collections into a single logical Collection?
  24. Correct, idiomatic way to use custom editor templates with IEnumerable models in ASP.NET MVC
  25. Java Ordered Map
  26. Difference between Arrays.asList(array) and new ArrayList(Arrays.asList(array))
  27. Printing HashMap In Java
  28. Is there a no-duplicate List implementation out there?
  29. Java collections convert a string to a list of characters
  30. Difference between a Seq and a List in Scala

Leave a Comment