Differences Between IEnumerable and IQueryable in C#

Understanding the differences between IEnumerable and IQueryable in C# is crucial for optimal data manipulation and querying. IEnumerable is used for in-memory data collections and supports deferred execution, while IQueryable is designed for remote data querying and can be translated into query languages like SQL. Using IEnumerable is best for local data collections, whereas IQueryable is ideal for querying large external data sources efficiently.