What is the difference between ICollection and IEnumerable?

An IEnumerable is a list or a container which can hold some items. You can iterate through each element in the IEnumerable. ICollection is another type of collection, which derives from IEnumerable and extends it’s functionality to add, remove, update element in the list.

Is IQueryable faster than IEnumerable?

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.

What is the difference between IEnumerable and list?

One important difference between IEnumerable and List (besides one being an interface and the other being a concrete class) is that IEnumerable is read-only and List is not. So if you need the ability to make permanent changes of any kind to your collection (add & remove), you’ll need List.

What is the use of IQueryable?

IQueryable is suitable for querying data from out-memory (like remote database, service) collections. While querying data from a database, IQueryable executes a “select query” on server-side with all filters. IQueryable is beneficial for LINQ to SQL queries.

What is the difference between ICollection and IList?

The main difference between the IList and ICollection interfaces is that IList allows you to access elements via an index. IList describes array-like types. Elements in an ICollection can only be accessed through enumeration. Both allow the insertion and deletion of elements.

What is difference between list and IList?

The main difference between List and IList in C# is that List is a class that represents a list of objects which can be accessed by index while IList is an interface that represents a collection of objects which can be accessed by index. List and IList are used to denote a set of objects.

Which one is better IEnumerable or IQueryable?

IEnumerable: IEnumerable is best suitable for working with in-memory collection (or local queries). IEnumerable doesn’t move between items, it is forward only collection. IQueryable: IQueryable best suits for remote data source, like a database or web service (or remote queries).

When should I use IQueryable?

IQueryable uses Expression objects that result in the query being executed only when the application requests an enumeration. Use IQueryable when you have to run ad-hoc queries against data source like LinQ to SQL Server,Entity framework and other sources which implement IQueryable.

Which is better IEnumerable or IQueryable?

What is the difference between returning IQueryable vs IEnumerable?

The main difference between “IEnumerable” and “IQueryable” is about where the filter logic is executed. One executes on the client side (in memory) and the other executes on the database.

What is difference between IList and List in C#?

The main difference between List and IList in C# is that List is a class that represents a list of objects which can be accessed by index while IList is an interface that represents a collection of objects which can be accessed by index. Overall, List is a concrete type that implements the IList interface.

What is difference between IEnumerable and IEnumerator in C#?

Main Differences Between IEnumerable and IEnumerator IEnumerable has only one method, whereas IEnumerator has only two methods. IEnumerable can return IEnumerator, but IEnumerator cannot return IEnumerable. IEnumerable cannot retain the cursor’s current state, but IEnumerator can retain.

What is the difference between IEnumerable and IQueryable in LINQ?

In LINQ to query data from database and collections, we use IEnumerable and IQueryable for data manipulation. IEnumerable is inherited by IQueryable, Hence IQueryable has all the features of IEnumerable and except this, it has its own features.

What is IQueryable in C#?

What is IQueryable in C#? Let us first see the definition of IQueryable as shown below. As you can see in the above image, the IQueryable is an interface and it is available in System.Linq namespace. The IQuerable interface is a child of the IEnumerable interface. So we can store IQuerable in a variable of type IEnumerable.

What are the advantages of IEnumerable?

IEnumerable is best to query data from in-memory collections like List, Array, etc. While query data from a database, IEnumerable execute a select query on the server side, load data in-memory on a client-side and then filter data. IEnumerable is suitable for LINQ to Object and LINQ to XML queries. IEnumerable supports deferred execution.

What is the difference between IEnumerable and query data from database?

IEnumerable can move forward only over a collection, it can’t move backward and between the items. IEnumerable is best to query data from in-memory collections like List, Array, etc. While query data from a database, IEnumerable execute a select query on the server side, load data in-memory on a client-side and then filter data.