学步园

if (ServiceHostingEnvironment.AspNetCompatibilityEnabled)
            {
                AspNetCompatibilityRequirementsAttribute a = host.Description.Behaviors.Find<AspNetCompatibilityRequirementsAttribute>();
                if (a == null)
                {
                    host.Description.Behaviors.Add(new AspNetCompatibilityRequirementsAttribute() { RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed });
                }
                else
                {
                    a.RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed;
                }
            }