Over time, you may end up with lots of sites running in IIS Express.  I like things neat and tidy, and periodically, I’ll run a little cleanup command as follows:

From PowerShell:

$appCmd = "C:\Program Files (x86)\IIS Express\appcmd.exe"

$result = Invoke-Command -Command {& $appCmd 'list' 'sites' '/text:SITE.NAME' }


for ($i=0; $i -lt $result.length; $i++)
{
    Invoke-Command -Command {& $appCmd 'delete' 'site'  $result[$i] }
}