Windows Dev Center

WindowsRuntimeStorageExtensions.OpenStreamForWriteAsync Method (, String, )

For apps that target Windows Phone OS 7.0 and 7.1, do not use any members of this type in your app. If you do, your code will throw a MethodAccessException. This type is security-critical, which restricts it to internal use by the .NET Framework for Windows Phone class library.

This API is not CLS-compliant. 

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

'Declaration
<CLSCompliantAttribute(False)> _
<ExtensionAttribute> _
Public Shared Function OpenStreamForWriteAsync ( _
	rootDirectory As IStorageFolder, _
	relativePath As String, _
	creationCollisionOption As CreationCollisionOption _
) As Task(Of Stream)

Parameters

rootDirectory
Type: Windows.Storage.IStorageFolder
relativePath
Type: System.String
creationCollisionOption
Type: Windows.Storage.CreationCollisionOption

Return Value

Type: System.Threading.Tasks.Task(Of Stream)

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IStorageFolder. When you use instance method syntax to call this method, omit the first parameter.

Windows Phone OS

Supported in: 8.1, 8.0

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