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How to convert IEnumerable to List and List back to 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.
List class represents the list of objects which can be accessed by index. It comes under the System.Collection.Generic namespace.
List class can be used to create a collection of different types like integers, strings etc. List class also provides the methods to search, sort, and manipulate lists.
Example 1
static void Main(string[] args) {
List list = new List();
IEnumerable enumerable = Enumerable.Range(1, 5);
foreach (var item in enumerable) {
list.Add(item);
}
foreach (var item in list) {
Console.WriteLine(item);
}
Console.ReadLine();
}Output
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Example 2
convert List to IEnumerable
static void Main(string[] args) {
List list = new List();
IEnumerable enumerable = Enumerable.Range(1, 5);
foreach (var item in enumerable) {
list.Add(item);
}
foreach (var item in list) {
Console.WriteLine(item);
}
IEnumerable enumerableAfterConversion= list.AsEnumerable();
foreach (var item in enumerableAfterConversion) {
Console.WriteLine(item);
}
Console.ReadLine();
}Output
1 2 3 4 5 1 2 3 4 5
Updated on: 25-Nov-2020
6K+ Views
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