extend the plattform service with a GetCities function

Plattform/Plattform/IPlattformService.cs

@@ -6,6 +6,7 @@ using System.ServiceModel;
 using System.Text;
 using Plattform.DB;
 using Plattform.Models;
+using Plattform.AirlineService;
 
 namespace Plattform
 {
@@ -27,5 +28,7 @@ namespace Plattform
         List<Gender> GetGenders();
         [OperationContract]
         List<Salutation> GetSaluations();
+        [OperationContract]
+        List<City> GetCities();
     }
 }

Plattform/Plattform/PlattformService.svc.cs

@@ -103,5 +103,18 @@ namespace Plattform
                 return new List<Salutation>();
             }
         }
+        public List<City> GetCities()
+        {
+            CityDB cityDB = new CityDB();
+            try
+            {
+              return cityDB.GetAllCities();
+            }
+            catch(Exception e)
+            {
+               System.Diagnostics.Trace.WriteLine(e);
+               return new List<City>();
+            }
+        }
     }
 }