What is Web Service - Beginners Concept ?

ASP.NET Web Services
Web services are components on a Web server that a client application can call by making HTTP requests across the Web. ASP.NET enables you to create custom Web services or to use built-in application services, and to call these services from any client application. We suggest the following progression of documentation to help you navigate through the related topics.


Source: http://msdn.microsoft.com/en-us/library/t745kdsh.aspx

Hi,

Webservices are backdated now. Better look into WCF services. Anyway, given below links should work for you.

Creating webservice:
http://www.4guysfromrolla.com/articles/062602-1.aspx

Calling webservice:
http://www.codeproject.com/KB/webservices/WebServiceConsumer.aspx

Asim

see the below links

http://www.codeguru.com/Csharp/Csharp/cs_webservices/tutorials/article.php/c5477

http://www.c-sharpcorner.com/uploadfile/ashok_kp/introductiontowebservicest11252005045531am/introductiontowebservicest.aspx

http://msdn.microsoft.com/en-us/library/t745kdsh.aspx

Hello:
A webservice is an inter-operable remote procedure call. You call methods on remote machine, their implementations is a black box from developer point of view. Any of the links provided in other answers may help.

Dhaest: webservice are not constrained to http transport. You can use tcp, msmq, named pipes or even smtp.
asimnazir123: Webservices are not out of date. ASMX webservices are, WCF are still web services.

Best regards.