Should I use IEnumerable or ICollection?
IEnumerable contains only GetEnumerator() method, like read-only iterate. ICollection is one step ahead of IEnumerable. If we want some more functionality like Add or remove element, then it is better to go with ICollection because we cannot achieve that with IEnumerable. ICollection extends IEnumerable.
What is the difference between ICollection and IEnumerable in C#?
Collections Namespace. IEnumerable is a forward only collection, it can’t move backward and between the items. IEnumerable is best to query data from in-memory collections like List, Array etc. IEnumerable doen’t support add or remove items from the list.
What is ICollection used for?
The basic idea of using ICollection is a provide an interface to readonly-access to some finite amount of data.
What is the use of IEnumerable ICollection IList and IDictionary?
To begin with, all the interfaces (ICollection, IList, IQueryable, IDictionary) inherit from IEnumerable, which allows us to use the foreach statement. ICollection: is the most basic interface among these, it is enumerable and it supports Count operator. IQueryable: an enumerable interface that supports LINQ.
Is IQueryable faster than list?
GetList(context) might return an object backed by a custom LINQ provider (like an Entity Framework collection), then you probably want to leave the data cast as an IQueryable: even though your benchmark shows it being 20 times faster to use a list, that difference is so small that no user is ever going to be able to …
Which is faster IEnumerable or list?
IQueryable is faster than IEnumerable. In addition to Munesh Sharma’s answer:IEnumerable loads data in-memory and then apply filters to it one by one but IQueryable apply filters all at once and return the result.
When should I use IEnumerable?
IEnumerable interface is used when we want to iterate among our classes using a foreach loop. The IEnumerable interface has one method, GetEnumerator, that returns an IEnumerator interface that helps us to iterate among the class using the foreach loop.
Does ICollection implement IEnumerable?
ICollection interface. The ICollection interface extends IEnumerable; IDictionary and IList are more specialized interfaces that extend ICollection. An IDictionary implementation is a collection of key/value pairs, like the Hashtable class.
What is the difference between ICollection and IList?
ICollection is an interface that exposes collection semantics such as Add() , Remove() , and Count . Collection is a concrete implementation of the ICollection interface. IList is essentially an ICollection with random order-based access.
Is IQueryable faster than List?
Which is better IQueryable or IEnumerable?
So if you working with only in-memory data collection IEnumerable is a good choice but if you want to query data collection which is connected with database `IQueryable is a better choice as it reduces network traffic and uses the power of SQL language.
What is the benefit of IEnumerable in C#?
IEnumerable in C# is an interface that defines one method, GetEnumerator which returns an IEnumerator interface. This allows readonly access to a collection then a collection that implements IEnumerable can be used with a for-each statement.
Is IEnumerable faster than list?
So it isn’t that IEnumerable is more efficient than list in a “performance” or “runtime” aspect. It’s that IEnumerable is a more efficient design construct because it’s a more specific indication of what your design requires. (Though this can lead to runtime gains in specific cases.)
What is ICollection in C#?
The ICollection interface in C# defines the size, enumerators, and synchronization methods for all nongeneric collections. It is the base interface for classes in the System. Collections namespace.
Which is faster IEnumerable or List?
Is IEnumerable lazy loading?
IEnumerable doesn’t support lazy loading. IQueryable support lazy loading. Hence it is suitable for paging like scenarios.
Does IEnumerable support lazy loading?
Why we use IEnumerable instead of List?
IEnumerable types have a method to get the next item in the collection. It doesn’t need the whole collection to be in memory and doesn’t know how many items are in it, foreach just keeps getting the next item until it runs out. List implements IEnumerable, but represents the entire collection in memory.