ASP. NET and System. Web. entity, version = 3.5.0.0

Error (scenario ): Configuration Error

Description:An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
Parser error message:Cocould not load file or assembly 'System. Web. entity, version = 3.5.0.0, culture = neutral, publickeytoken = b77a5c561934e089 'or one of its Dependencies. The system cannot find the file specified.
Source error:

Line 69: <add Assembly = "system. web. extensions. design, version = 3.5.0.0, culture = neutral, publickeytoken = 31bf3856ad364e35 "/> line 70: <add Assembly =" system. data. LINQ, version = 3.5.0.0, culture = neutral, publickeytoken = b77a5c561934e089 "/> line 71: <add Assembly =" system. web. entity, version = 3.5.0.0, culture = neutral, publickeytoken = b77a5c561934e089 "/> line 72: <add Assembly =" system. data. entity, version = 3.5.0.0, culture = neutral, publickeytoken = b77a5c561934e089 "/> Line 73: <add Assembly =" system. security, version = 2.0.0.0, culture = neutral, publickeytoken = b03f5f7f11d50a3a "/>
 

Source file:F: \ live demos \ WEB. configLine:71

Assembly load trace:The following information can be helpful to determine why the Assembly 'System. Web. entity, version = 3.5.0.0, culture = neutral, publickeytoken = b77a5c561934e089 'could not be loaded.

WRN: Assembly Binding logging is turned off. To enable Assembly bind failure logging, set the registry value [HKLM \ Software \ Microsoft \ Fusion! Enablelog] (DWORD) to 1. note: There is some performance penalty associated with Assembly bind failure logging. to turn this feature off, remove the registry value [HKLM \ Software \ Microsoft \ Fusion! Enablelog].
 

Version Information: Microsoft. NET Framework Version: 2.0.50727.1433; ASP. NET version: 2.0.50727.1433

Solution ):

Install)

1. NET Framework 3.5 Service Pack 1: http://www.microsoft.com/downloads/details.aspx? Familyid = ab99342f-5d1a-413d-8319-81da479ab0d7 & displaylang = en

2. Microsoft Visual Studio 2008 Service Pack 1: http://www.microsoft.com/downloads/details.aspx? Familyid = FBEE1648-7106-44A7-9649-6D9F6D58056E & displaylang = EN