[IIS]不能加载类型System.ServiceModel.Activation.HttpModule

for more inform
ation about the eraaaaaror and where it originated in the code. Exception Details: System.TypeLoadException: Could not load type ‘System.ServiceModel.Activation.HttpModule’ from assembly ‘System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089′.

如上错误，使用命令：
c:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -iru