You get this error when running your application:
System.ArgumentException: Virtual directory does not exist.
at IronSpeed.Designer.WebServerUtils.IsAspNetIISScriptMapValid(FrameworkVersion version, String virtualDirectory, String dirPath)
This problem usually happens if the web server setting in your application’s Web.config file is incorrect.
Use the correct web server in your application’s Web.config file.
See Creating a Virtual Directory for Your Application for details on creating a virtual directory.
Part VII: Troubleshooting Applications
Application Runs But No Data is Displayed