Создать список по указанному пути
Lists listService = new Lists();
listService.PreAuthenticate = true;
listService.Credentials = new NetworkCredential(username,password,domain;
String url = "http://YourServer/SiteName/"; // put your desired path here
listService.Url = url @ + /_vti_bin/lists.asmx";
XmlNode ndList = listService.AddList(NewListName, "Description", 100);