Include version number in a file on successful build

[bwebsysda]

I developed an ASP.NET web site. When viewing the application in the browser the version number is shown in the footer of the application. But I want to communicate the version number with the customer even if the appliction is not running. Is it good to use a post build event for it to write it into a text file? If so, how can I access the version number (there is no predefined variable for this) and how can I write it into a text file via the command-line?Are there any other, maybe simpler ways of getting this done?Thanks for you help.Edit: What I forgot to say is that it should be included when publishing the project using the Publish dialog.