IEnumerable Vs IQueryable

C# Basic, MVC

Differences between them based on their properties :

IEnumerable

  1. NamespaceSystem.Collections Namespace
  2. Derives from: No base interface
  3. Deferred Execution : Supported
  4. Lazy Loading : Not Supported
  5. How does it work : While querying data from database, IEnumerable execute select query on server side, load data in-memory on client side and then filter data. Hence does more work and becomes slow.
  6. Suitable for : LINQ to Object and LINQ to XML queries.
  7. Custom Query : Doesn’t supports.
  8. Extension method parameter : Extension methods supported in IEnumerable takes functional objects.
  9. When to use : When querying data from in-memory collections like List, Array etc.
  10. Best Uses : In-memory traversal

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