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What does the interface IEnumerable do 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.
It has a single method −
GetEnumerator() − This method returns an enumerator that iterates through a collection.
The following is the implementation of the GetEnumerator() method of the IEnumerable interface in C# −
IEnumerator IEnumerable.GetEnumerator() {
return (IEnumerator) GetEnumerator();
}The following are the extension methods of the IEnumerable interface in C# −
| Sr.No | Method Name & Description |
|---|---|
| 1 | AsParallel() Enables parallelization of a query |
| 2 | AsQueryable() The method converts an IEnumerable to an IQueryable. |
| 3 | Cast<TResult>() The method casts the elements of an IEnumerable to the specified type |
| 4 | OfType<TResult>() Filters the elements of an IEnumerable based on a specified type. |
Updated on: 20-Jun-2020
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