Initializes a new instance of the HttpClient class with a specific handler.
Namespace:  System.Net.Http
Assembly:  System.Net.Http (in System.Net.Http.dll)
Syntax
'Declaration
Public Sub New ( _
    handler As HttpMessageHandler _
)
'Usage
Dim handler As HttpMessageHandler 
Dim instance As New HttpClient(handler)
public HttpClient(
    HttpMessageHandler handler
)
public:
HttpClient(
    HttpMessageHandler^ handler
)
new : 
        handler:HttpMessageHandler -> HttpClient
public function HttpClient(
    handler : HttpMessageHandler
)
Parameters
- handler
Type: System.Net.Http.HttpMessageHandler
The HTTP handler stack to use for sending requests. 
Remarks
For a complete example of using the HttpClient class, see Calling a Web API From a .NET Client