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Enumerable.ToList(TSource) Method

Creates a List(T) from an IEnumerable(T).

Namespace:  System.Linq
Assemblies:   System.Linq (in System.Linq.dll)
  System.Core (in System.Core.dll)

static member ToList : 
        source:IEnumerable<'TSource> -> List<'TSource> 

Type Parameters


The type of the elements of source.


Type: System.Collections.Generic.IEnumerable(TSource)

The IEnumerable(T) to create a List(T) from.

Return Value

Type: System.Collections.Generic.List(TSource)
A List(T) that contains elements from the input sequence.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerable(TSource). When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).


source is a null reference (Nothing in Visual Basic).

The ToList(TSource)(IEnumerable(TSource)) method forces immediate query evaluation and returns a List(T) that contains the query results. You can append this method to your query in order to obtain a cached copy of the query results.

ToArray(TSource) has similar behavior but returns an array instead of a List(T).

The following code example demonstrates how to use ToList(TSource) to force immediate query evaluation and return a List(T) that contains the query results.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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