Hi ,
I found the following link that talks abt the same

Walkthrough: Creating an XML Web Service Using Visual Basic or Visual C# :
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Visit the following site for full details:
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1.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsent7/html
/vbwlkwalkthroughbuildingwebservicewithmanagedcode.asp

2.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/
vbtskDeployingWebServices.asp

The following walkthrough describes the process for creating an XML Web
service that converts temperatures measured in Fahrenheit to Celsius using
Visual Basic or Visual C#.

During the course of this walkthrough, you will accomplish the following
activities:

Create an XML Web service using the ASP.NET Web Service project template.
Implement the XML Web service.
Run the XML Web service in debug mode.
Deploy the XML Web service.

Deploying the XML Web Service:
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To make your XML Web service available to others, you must deploy it to a
Web server that is accessible to the clients you wish to support. To deploy
the XML Web service to a server other than the development server, you can
either add a Web Setup project or copy the required files to the
destination server. In this walkthrough, you can choose how to deploy this
XML Web service. For more information, see Deploying XML Web Services in
Managed Code