HttpClient.BaseAddress Property
.NET Framework 4.5
Gets or sets the base address of Uniform Resource Identifier (URI) of the Internet resource used when sending requests.
Namespace: System.Net.Http
Assembly: System.Net.Http (in System.Net.Http.dll)
When sending a HttpRequestMessage with a relative Uri, the message Uri will be added to the BaseAddress property to create an absolute Uri.
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.