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WebRequest.GetRequestStreamAsync Method

.NET Framework 4.5

When overridden in a descendant class, returns a Stream for writing data to the Internet resource as an asynchronous operation.

Namespace:  System.Net
Assembly:  System (in System.dll)

[HostProtectionAttribute(SecurityAction.LinkDemand, ExternalThreading = true)]
public virtual Task<Stream> GetRequestStreamAsync()

Return Value

Type: System.Threading.Tasks.Task<Stream>
Returns Task<TResult>.
The task object representing the asynchronous operation.

This operation will not block. The returned Task<TResult>object will complete when the Stream for writing data to the Internet resource is available.

After you call GetRequestStreamAsync, make sure you close the request stream before you call GetResponseAsync.

NoteNote

The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: ExternalThreading. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

.NET Framework

Supported in: 4.6, 4.5

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8
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