Assembly: System.Runtime.dll
Represents a strongly typed collection that can be enumerated. The IEnumerable<T> interface is the base interface for all generic collections that can be enumerated.
Remarks
The IEnumerable<T> interface represents a collection that can be enumerated. It is the base interface for all generic collections that can be enumerated. The IEnumerable<T> interface is used to iterate over a collection of a specific type. The GetEnumerator method returns an IEnumerator<T> object that can be used to iterate through the collection.
The out keyword in the generic type parameter <out T> indicates that T is an output type, meaning that the generic type parameter can be contravariant. This allows you to use a more general type than originally specified (e.g., you can use an IEnumerable<string> where an IEnumerable<object> is expected).
Many LINQ extension methods operate on collections that implement IEnumerable<T>.
Members
Methods
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System.Collections.Generic.IEnumerator<T>GetEnumerator()Returns an enumerator that iterates through the collection.
System.Collections.IEnumerableGetEnumerator()Returns an enumerator that iterates through a collection. This is an explicit interface implementation of
System.Collections.IEnumerable.GetEnumerator.
Inherited Members
This interface inherits the members of the System.Collections.IEnumerable interface.
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System.Collections.IEnumeratorGetEnumerator()Returns an enumerator that iterates through a collection.
Examples
The following C# code example demonstrates how to use the IEnumerable<T> interface to iterate over a list of strings.
using System;
using System.Collections.Generic;
public class Example
{
public static void Main(string[] args)
{
IEnumerable<string> names = new List<string> { "Alice", "Bob", "Charlie" };
foreach (string name in names)
{
Console.WriteLine(name);
}
}
}