How Do I Add Web Service Reference Residing On Server Of Client User Into .Net Web Application Solution At Time Of Publishing ?

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IIS6

C#

ASP.NET

IIS

I have web application project.. on building web application, i add web reference by clicking on add service reference and giving address.. but when i publish the site onto server computer of client user,i have to change web reference address. i.e. i need to change application setting values of web.config to set the web address according to client computer ip address.. i had tried doing it on IIS on application setting but it was a long process to add more than 50 web reference.. Is there an alternative way to add web service reference residing on server of client user into web application solution at time of publishing????