An example of "cannot start debugging on the Web server" is solved.

However, I don't know why I can't debug it recently. I checked the relevant articles and tried the following methods:

1: Check that "ASP. NET debugging enabled" is "true" in "configuration properties"

2: Confirm "DEBUG = true" in your "Web. config"

3: If you have installed wind2000 SP4, Run "regsvr32 I aspnet_isap.dll" on the command line"

4: view the site information in IIS, select "Directory Security", which includes "Anonymous Access and authentication control", and then click "Edit .. ", confirm that the" Integrated Windows Authentication "option is selected

5: Choose ie option> Security Settings> Custom Level, and click "user verification". Check that "automatically log on with the current user name and password" is selected"

6: Run c: \ winnt \ Microsoft. NET \ framework \ v1.0.3705 \ aspnet_regiis.exe-I

7: Control Panel-management tools-Computer Management-local users and groups-users, double-click the ASPNET user to add the Administrators
The above operations are the most useful steps 5th and 7th.

If the following error message is displayed:
"You cannot start debugging on the Web server. You have not configured the project as debugging ".

It is generally estimated that the project is copied directly to open it. You need to reconfigure IIS.
Control Panel> Internet Service Manager> default web site> your project directory> Properties> application settings> Application name> Create"

You can debug the 5th methods.