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.NET Framework Class Library
EnumerableToArrayTSource Method

Creates an array from a IEnumerableT.

Namespace:   System.Linq
Assembly:  System.Core (in System.Core.dll)
Syntax
<[%$TOPIC/bb298736_en-us_VS_110_2_0_0_0_0%]> _
Public Shared Function ToArray(Of TSource) ( _
	source As [%$TOPIC/bb298736_en-us_VS_110_2_0_0_0_1%](Of TSource) _
) As TSource()
public static TSource[] ToArray<TSource>(
	this [%$TOPIC/bb298736_en-us_VS_110_2_0_1_0_0%]<TSource> source
)
[[%$TOPIC/bb298736_en-us_VS_110_2_0_2_0_0%]]
public:
generic<typename TSource>
static array<TSource>^ ToArray(
	[%$TOPIC/bb298736_en-us_VS_110_2_0_2_0_1%]<TSource>^ source
)
static member ToArray : 
        source:[%$TOPIC/bb298736_en-us_VS_110_2_0_3_0_0%]<'TSource> -> 'TSource[] 

Type Parameters

TSource

The type of the elements of source.

Parameters

source
Type: System.Collections.GenericIEnumerableTSource

An IEnumerableT to create an array from.

Return Value

Type: TSource
An array that contains the 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 IEnumerableTSource. 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).
Exceptions
ExceptionCondition
ArgumentNullException

source is .

Remarks

The ToArrayTSource(IEnumerableTSource) method forces immediate query evaluation and returns an array that contains the query results. You can append this method to your query in order to obtain a cached copy of the query results.

ToListTSource has similar behavior but returns a ListT instead of an array.

Examples

The following code example demonstrates how to use ToArrayTSource to force immediate query evaluation and return an array of results.

Structure Package
        Public Company As String 
        Public Weight As Double 
    End Structure 

    Sub ToArrayEx1()
        ' Create a list of Package values. 
        Dim packages As New List(Of Package)(New Package() _
             {New Package With {.Company = "Coho Vineyard", .Weight = 25.2}, _
              New Package With {.Company = "Lucerne Publishing", .Weight = 18.7}, _
              New Package With {.Company = "Wingtip Toys", .Weight = 6.0}, _
              New Package With {.Company = "Adventure Works", .Weight = 33.8}})

        ' Project the Company values from each item in the list 
        ' and put them into an array. 
        Dim companies() As String = _
            packages _
            .Select(Function(pkg) pkg.Company) _
            .ToArray()

        ' Display the results. 
        Dim output As New System.Text.StringBuilder
        For Each company As String In companies
            output.AppendLine(company)
        Next
        MsgBox(output.ToString())
    End Sub 

    ' This code produces the following output: 
    ' 
    ' Coho Vineyard 
    ' Lucerne Publishing 
    ' Wingtip Toys 
    ' Adventure Works
class Package
            {
                public string Company { get; set; }
                public double Weight { get; set; }
            }

            public static void ToArrayEx1()
            {
                List<Package> packages =
                    new List<Package> 
                        { new Package { Company = "Coho Vineyard", Weight = 25.2 },
                          new Package { Company = "Lucerne Publishing", Weight = 18.7 },
                          new Package { Company = "Wingtip Toys", Weight = 6.0 },
                          new Package { Company = "Adventure Works", Weight = 33.8 } };

                string[] companies = packages.Select(pkg => pkg.Company).ToArray();

                foreach (string company in companies)
                {
                    Console.WriteLine(company);
                }
            }

            /*
             This code produces the following output:

             Coho Vineyard
             Lucerne Publishing
             Wingtip Toys
             Adventure Works
            */
Version Information

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1
Platforms

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.