IIS 7 Command Line Tools: Start and Stop Sites via Command Line

Install IIS 7 Management Scripts and Tools
To use IIS command line tools you will need to install IIS Management Scripts and Tools:

1. Control Panel; Programs and Features; Turn Windows Features on or off (left hand side)
2. In Windows Features box Expand Internet Information Services; Web Management Tools and select IIS Management Scripts and Tools:
   
3. Select OK and wait while it installs.

To Start and Stop a Site from the Command Line

1. Open a command prompt: Start, cmd, Enter
2. Enter the code below:
   %systemroot%\system32\inetsrv\APPCMD START Site [Site.Name]
   Replacing [Site.Name] with the site’s name.

The command takes the following format:
APPCMD (command) (object-type) <identifier> < /parameter1:value1 ... >*
You could use this as part of a project build script to reset the site before debugging.
Ref: http://learn.iis.net/page.aspx/114/getting-started-with-appcmdexe/