[Fix] - Error message after you install the .NET Framework 4.0 Could not load type System.ServiceModel.Activation.HttpModule
Scenario :
- When I try to run a web application in visual studio the page could Not Load Type and the following error will occur
‘System.ServiceModel.Activation.HttpModule’.
- And also If we try to run a service in the web application and receive a messages over the HTTP transport by receiving an error similar to the following:
Server Error in '/WCFApplication' Application
Could not load type
'System.ServiceModel.Activation.HttpModule' from assembly
'System.ServiceModel, Version=3.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089'.
- An unhandled exception occurs during the execution of the current Web request.
- And review the stack trace for more information about the error and check whether is 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'.
Error :
Error message after you install the .NET Framework 4.0: "Could not load type 'System.ServiceModel.Activation.HttpModule'"
Reason :
- Generally, this issue will occur because the Applicationhost.config file for Windows Process Activation Service (WAS) was incompatible for .NET Framework 4.0
<add name="ServiceModel"
type="System.ServiceModel.Activation.HttpModule, System.ServiceModel,
Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
preCondition="managedHandler" />
And define” precondition” like this way:
<add name="ServiceModel"
type="System.ServiceModel.Activation.HttpModule, System.ServiceModel,
Version=3.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089"
preCondition="managedHandler,runtimeVersionv2.0" />
Note :
- We can find the Applicationhost.config file using the following location:
%windir%\system32\inetsrv\config
Fix :
- Here we can resolve this issue by run the following command:
aspnet_regiis.exe /iru
- The Aspnet_regiis.exe file can be found in one of the following locations:
- %windir%\Microsoft.NET\Framework\v4.0.30319
- %windir%\Microsoft.NET\Framework64\v4.0.30319 (on a 64-bit computer)
Applies to :
- Windows Workflow Foundation
- Windows Communication Foundation
- Microsoft .NET Framework 4
Related Tags :
- Error message after you install the .NET Framework 4.0
- Could not load type 'System.ServiceModel.Activation.HttpModule'
- asp.net - Could not load type 'System.ServiceModel.Activation
- Could not load type System.ServiceModel.Activation.HttpModule
- Could not load type System.ServiceModel.Activation.HttpModule
- Could not load type 'System.ServiceModel.Activation.HttpModule' from
