Silverlight 5 WinRT

  public sealed class AspNetCompatibilityRequirementsAttribute
  : Attribute, _Attribute, IServiceBehavior
  public AspNetCompatibilityRequirementsMode RequirementsMode { get; set; }

  public sealed enum AspNetCompatibilityRequirementsMode
  : IComparable, IFormattable, IConvertible
  { NotAllowed, Allowed, Required }

  public abstract class ServiceHostFactoryBase
 
  public abstract virtual ServiceHostBase CreateServiceHost(String constructorString, Uri baseAddresses);

  public sealed class VirtualPathExtension
  : IExtension`1<ServiceHostBase>
  public String ApplicationVirtualPath { get; set; }
  public String SiteName { get; set; }
  public String VirtualPath { get; set; }
  public virtual void Attach(ServiceHostBase owner);
  public virtual void Detach(ServiceHostBase owner);