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HttpClientHandler.SendAsync Method

.NET Framework 4.5

Creates an instance of HttpResponseMessage based on the information provided in the HttpRequestMessage as an operation that will not block.

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

protected internal override Task<HttpResponseMessage> SendAsync(
	HttpRequestMessage request,
	CancellationToken cancellationToken


Type: System.Net.Http.HttpRequestMessage

The HTTP request message.

Type: System.Threading.CancellationToken

A cancellation token to cancel the operation.

Return Value

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


The request was null.

This operation is does not block. It returns an instance of Task<TResult> to represent the asynchronous operation. When the operation completes, Result contains the response message.

.NET Framework

Supported in: 4.5

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1

Windows Phone 8.1, 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.

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