Why do we use IEnumerable interface in C#?

Related questions

1. What is the difference between IEnumerable and ICollection?
2. What is difference between IEnumerable and IQueryable in C#?
3. What are the differences between IEnumerable and IQueryable?
4. What is MVC FirstOrDefault?
5. What is generic list in C#?
6. What is ICollection in MVC?
7. What is difference between list and IEnumerable?
8. What is a collection in C#?
9. Does array implement IList?
10. What is MVC IQueryable?

Tags

1. #interface
2. #ienumerable
3. #collections
4. #foreach
5. #because
6. #lists
7. #strings
8. #stacks
9. #every
10. #block
11. #pattern
12. #string
13. #iterate
14. #using
15. #implement
16. #ienumerator
17. #enumerable
18. #character
19. #iterator
20. #dictionaries
21. #implementation
22. #queues