WindowsRuntimeStreamExtensions.AsStream Method (IRandomAccessStream)

.NET Framework (current version)

Converts a random access stream in the Windows Runtime to a managed stream in the .NET for Windows 8.x Store apps.

This API is not CLS-compliant. 

Namespace:  System.IO
Assembly:  System.Runtime.WindowsRuntime (in System.Runtime.WindowsRuntime.dll)

public static Stream AsStream(
	this IRandomAccessStream windowsRuntimeStream


Type: IRandomAccessStream

The Windows Runtime IRandomAccessStream object to convert.

Return Value

Type: System.IO.Stream
The converted stream.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IRandomAccessStream. 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).


windowsRuntimeStream is null.

A default buffer size of 16,384 bytes is used when converting the stream. To specify a different buffer size, use the AsStream(IRandomAccessStream, Int32) overload.

.NET Framework

Supported in: 4.6, 4.5

.NET for Windows Phone apps

Supported in: Windows Phone Silverlight 8