HttpRuntimeSection::AsyncPreloadMode Property
.NET Framework 4.5
Gets or sets the mode of the request entity that is asynchronously preloaded.
Namespace: System.Web.Configuration
Assembly: System.Web (in System.Web.dll)
This property must to be set before ExecuteRequestHandler is set in the ASP.NET pipeline.
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.