About IIS registration in ASP. NET!

When multiple tasks are executed concurrently on a computer. net Framework, which is mapped to ASP. NET application ASP. the. net isapi version determines the version of the Common Language Runtime library used by the application. ASP. net iis registration tool (aspnet_regiis.exe) Allows administrators or installers to conveniently update script ing of ASP. NET applications so that they point to the ASP. net isapi version associated with the tool. The tool can also be used to display the status of all installed ASP. NET versions, register ASP. NET versions coupled with the tool, create client script directories, and perform other configuration operations.

This error occurs when ASP. NET is not correctly installed on the computer you are trying to debug. This may mean that ASP. NET has never been installed, or ASP. NET was installed before IIS.

Reinstall ASP. NET

In the Command Prompt window, enter the command.

 

Registration of ASP. net iis of different versions:
ASP. NET 1.1.4322 C:/Windows/Microsoft. NET/framework/v1.1.4322/aspnet_regiis.exe
ASP. NET 2.0.50727 C:/Windows/Microsoft. NET/framework/v2.0.50727/aspnet_regiis.exe

Run "cmd" and switch to the specified directory (C:/Windows/Microsoft. NET/framework/v1.1.4322/). The registration command is as follows:
Aspnet_regiis.exe-I

 

For details, refer:

Http://msdn.microsoft.com/zh-cn/library/k6h9cz8h.aspx