.NET Web服务客户端 - 客户端发现响应内容类型为“text / plain”，但预期为“text / xml”

I have an ASP.NET webpage that has a web reference to a SOAP WSDL. If I call the methods associated with this WSDL (the methods live on another server), everything works fine. However, I'd like to be able to dynamically change the endpoint address where the WSDL points. The reason being that we host the same set of web services for different groups and we like to track who's using the web services. So, each set has its own URL.I have an ASP.NET webpage that has a web refere