Web Services Using C# - Chapter 4 - Consuming Web Service In Web Application

Hi, Web Services use namespaces to distinguish their types from the types of other services. http://tempuri.org/ is a temporary (hence the name) namespace that should be replaced when put into a live environment. Microsoft .Net Recommendations you to Change the default namespace before the XML Web service is made public. TempURI is considered as that the web service is still under development.Moreover, if you access to the web service by browser and you will get above messagefor recommendation . So, We should access the aspx page if still want tempuri.

From MSDN: An XML Web service should change its default XML namespace before it is made public. Each XML Web service needs a unique XML namespace to identify it so that client applications can distinguish it from other services on the Web. http://tempuri.org/ is available for XML Web services that are under development, but published XML Web services should use a more permanent namespace. Your XML Web service should be identified by a XML namespace that you control. For example, you could use your company's Internet domain name as part of the XML namespace. Although many XML Web service XML namespaces look like URLs, they need not point to an actual resource on the Web. (XML Web service XML namespaces are URIs.) For XML Web services created using ASP.NET, the default XML namespace can be changed using Namespace property.