Code sample provider hosted app implementation that specific to Azure Control Access Service.

 var spContext = SharePointAcsContextProvider.Current.GetSharePointContext(Context);
            using (var clientContext = spContext.CreateUserClientContextForSPHost())
            {
                var properties = clientContext.Web.AllProperties;
                clientContext.Load(properties);
             
               
                clientContext.ExecuteQuery();
                foreach(var items in properties.FieldValues)
                {
                    Response.Write("Property Name:" +items.Key+":"+ "Values:"+ items.Value);
                }
               

            }