//BusinessLogicMethod() is not exposed to the public to use
//(because it is not declared as a Web method), 
//but WebServiceMethod() is.
//All you have to do is extend the WebService class and identify which methods are Web service //methods using the WebMethod attribute
//using System.Web.Services;
public class AWebService : WebService
{
  public AWebService 
  {
    // constructor code 
  }
  public void BusinessLogicMethod() {
    // code here
  }
  [WebMethod(Description="A Web Method", EnableSession=false)]
  public int WebServiceMethod() 
  {
    // code here
  }
}