Can we convert List to IEnumerable in C#?

We can use the AsEnumerable() function of LINQ to convert a list to an IEnumerable in C#.

How do I make a List IEnumerable?

You can use the extension method AsEnumerable in Assembly System. Core and System. Linq namespace : List<Book> list = new List<Book>(); return list.

Can we convert IEnumerable to List?

In C#, an IEnumerable can be converted to a List through the following lines of code: IEnumerable enumerable = Enumerable. Range(1, 300); List asList = enumerable. ToList();

What is the difference between IEnumerable and List in C#?

The main difference between IEnumerable and List in C# is that IEnumerable is an interface, while List is a concrete class. Moreover, IEnumerable is read-only and List is not.

What is AsEnumerable in C#?

AsEnumerable() in C#

To cast a specific type to its IEnumerable equivalent, use the AsEnumerable() method. It is an extension method. The following is our array − int[] arr = new int[5]; arr[0] = 10; arr[1] = 20; arr[2] = 30; arr[3] = 40; arr[4] = 50; Now, get the IEnumerable equivalent.

What is IEnumerable in C#?

IEnumerable is an interface defining a single method GetEnumerator() that returns an IEnumerator interface. It is the base interface for all non-generic collections that can be enumerated. This works for read-only access to a collection that implements that IEnumerable can be used with a foreach statement.

What is IEnumerable list 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.

What is IEnumerable type in C#?

Which is better IEnumerable or List?

IEnumerable is best to query data from in-memory collections like List, Array etc. IEnumerable doesn’t support add or remove items from the list. Using IEnumerable we can find out the no of elements in the collection after iterating the collection. IEnumerable supports deferred execution.

What is IEnumerable collection in C#?

Why we use IEnumerable instead of List?

What is AsQueryable () in C#?

AsQueryable() in C#
AsQueryable() method is used to get an IQueryable reference. Let us see an example to find sum of integer values. Firstly, set an integer array. var arr = new int[] { 100, 200, 300, 400 };

What is the difference between AsEnumerable and AsQueryable?

AsEnumerable preserves deferred execution and does not build an often useless intermediate list. On the other hand, when forced execution of a LINQ query is desired, ToList can be a way to do that. AsQueryable can be used to make an enumerable collection accept expressions in LINQ statements.

Why IEnumerable is faster than list?

We aren’t forcing the caller to convert their data structure to a List unnecessarily. So it isn’t that IEnumerable<T> is more efficient than list in a “performance” or “runtime” aspect. It’s that IEnumerable<T> is a more efficient design construct because it’s a more specific indication of what your design requires.

What is the purpose of IEnumerable?

Which is faster IEnumerable or IQueryable?

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.

Should I repository return List or IEnumerable?

It depends on whether you wish to have any future queries performed on the entity and whether these should be in memory or not: If there are to be future queries and the DB should do the work return IQueryable. If there are to be future queries and it is to be done in memory return IEnumerable.

What is the function of IEnumerable in collection in C#?

Collections. IEnumerable. IEnumerable<T> contains a single method that you must implement when implementing this interface; GetEnumerator, which returns an IEnumerator<T> object. The returned IEnumerator<T> provides the ability to iterate through the collection by exposing a Current property.

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 …

Why do we need IEnumerable in C#?

Is IEnumerable faster than list?

So it isn’t that IEnumerable<T> is more efficient than list in a “performance” or “runtime” aspect. It’s that IEnumerable<T> 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.)

Why do we use IEnumerable in C#?

Should I repository return list or IEnumerable?

Why do we use AsQueryable () on collection?

AsQueryable() method is used to get an IQueryable reference. Let us see an example to find sum of integer values. Firstly, set an integer array. var arr = new int[] { 100, 200, 300, 400 };

Is IEnumerable in memory?

IEnumerable is read-only and List is not. 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.