IIS7 solution using the. NET Framework v4.0 run the Library 500 error _win server

Fault Description:
1 IIS7.5 installed in Windows Server 2008 R2 Environment
2) installation. Net4.5
3 Run the website, report 500 errors; Check the code for Webconfig, no problem.

Workaround: Re-register. Net4.5, the process is as follows:
First, enter the cmd word in the lookup box, and then appear the Cmd.exe application

Second, Cmd.exe right button, choose to run as an administrator.


Third, to the Command line window paste the following command, enter, complete registration.

Copy Code code as follows:

"%windir%\microsoft.net\framework\v4.0.30319\aspnet_regiis.exe"-iru-enable

Four, this time, we see that IIS, 4.0 Run-time Library Support registration success.

Five, refresh ie, the site is normal out.