Services are reusable application components shared to other components via a communication protocol, typically over a network. A service can provide more than one operation. The application logic of a service is exposed via API (Application Program Interface). There are two major classes of web service: REST-compliant web services and Arbitrary web services.
When we need our app to write data in a central server or read data from it, we always need to write a service server side that allows us to open a communication channel.
A particular type of Arbitrary web service is described by the Web Service Description Language (WSDL). WSDL is an XML-based interface definition language that is used for describing the functionality offered by a web service.
To use a WSDL, we need to right-click on the project and select Add a Web Reference:
In the web service URL, we have to put the address of the server that provides the web service. Xamarin Studio automatically...