Question: Error hint--there is no type or namespace name "UI" in the Namespace "system.web" (Is there a missing assembly reference?) How to fix??

Transferred from: http://topic.csdn.net/u/20080723/21/7e1e06cb-d013-4675-ba9b-9b39d49d0a0e.html

1) Add a reference to the System.Web.dll 2) SortDirection enumeration under the System.Web.UI.WebControls namespace, add a reference to the System.Web.dll, and then use this namespace to Check MSDN for this kind of problem, it's all written. ------------------------------------------------ Note: This enumeration is new in the. NET Framework version 2.0. Specifies the direction in which the list of items is sorted. Namespaces: System.Web.UI.WebControls Assembly: system.web (in System.Web.dll) Grammar C# public enum SortDirection

Question: Error hint--there is no type or namespace name "UI" in the Namespace "system.web" (Is there a missing assembly reference?) How to fix??