Failed to load class from assembly "system. servicemodel, version = 3.0.0.0"

Failed to import from Assembly "system. servicemodel, version = 3.0.0.0, culture = neutral, publickeytoken = b77a5c561934e089 "causes of this error: a later version is installed.. NET Framework:

 

 

 

Step 1: Find the configuration file applicationhost, see path: % WINDIR %/system32/inetsrv/config/applicationhost

 

 

 

Find

<Add name = "servicemodel" type = "system. servicemodel. activation. httpmodule, system. servicemodel, version = 3.0.0.0, culture = neutral, publickeytoken = b77a5c561934e089 "precondition =" managedhandler "/>

 

Add ", runtimeversionv2.0" to managedhandler,

 

 

Step 2: Open the address c: \ windows \ Microsoft. NET \ framework \ v4.0.30319 at the command prompt, enter aspnet_regiis.exe-IRU, and press Enter. For more information, see

 

From: http://hi.baidu.com/99kabaxi55/item/5e0effe7750b1b3686d9de93

The above operations generally solve this problem.