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Enumerable.ToArray<TSource> Method

Creates an array from a IEnumerable<T>.

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

public static TSource[] ToArray<TSource>(
	this IEnumerable<TSource> source
)

Type Parameters

TSource

The type of the elements of source.

Parameters

source
Type: System.Collections.Generic.IEnumerable<TSource>
An IEnumerable<T> 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 IEnumerable<TSource>. When you use instance method syntax to call this method, omit the first parameter.

ExceptionCondition
ArgumentNullException

source is null.

The ToArray<TSource>(IEnumerable<TSource>) 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.

ToList<TSource> has similar behavior but returns a List<T> instead of an array.

The following code example demonstrates how to use ToArray<TSource> to force immediate query evaluation and return an array of results.


      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)
         {
            outputBlock.Text += company + "\n";
         }
      }

      /*
       This code produces the following output:

       Coho Vineyard
       Lucerne Publishing
       Wingtip Toys
       Adventure Works
      */



Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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