Assembly: System.Web (in system.web.dll)
'Declaration Public ReadOnly Property IsAsync As Boolean 'Usage Dim instance As Page Dim value As Boolean value = instance.IsAsync
Property Valuetrue if the page is in asynchronous mode; otherwise, false;
Use the IsAsync property to determine whether the Web page is running in asynchronous mode. This information is useful if controls or code on the page need to modify their behavior depending on whether the page is asynchronous. For more information about asynchronous programming, see Asynchronous Operations with ADO.NET.