What web service is used in .net?

A web service is a programmable application logic accessible via standard web protocols.one of these web protocol is Simple Objec tAcess Protocol(SOAP).SOAP uses standard based technology (XML for data description & HTTP for transportation to encode and transmit data application).

web service platform elements-

1.SOAP

2.UDDI

3.WSDL

SOAP is an xml based protocol to let application exchange information over http

UDDI(universal description,discovery and integeration) is directory service where companies can register & search for web services.

WSDL(web services description language) is an xml based language for locating and describing web services.

to create web service in asp.net with c#,use visual studio IDE

click file--new--website--opens a new website template window--select c# language--choose asp.net webservice template.

choose web location :HTTP click on ok.it comes like this:

http://localhost/demowebservice

  --app_code

        --Service.cs  (it is default web service business classs)

  --app_data

         --service.asmx( it is default web service)

          --web.config

IIS

web service is nothing but an implementation of Service Oriented Architecture (SOA) which simply is loosely coupled system.

They do not depend on any specific plateform or technology like java, .net, php etc. They can be consumed by anyone.

You can refer this link also to understand it better.

What ever be the calling platform the response content would be same, irrespective of technology.