diff --git a/CampusAppWP8/CampusAppWP8/Model/Person/PersonListWp8Model.cs b/CampusAppWP8/CampusAppWP8/Model/Person/PersonListWp8Model.cs
index 4a95dcb9..fe47181e 100644
--- a/CampusAppWP8/CampusAppWP8/Model/Person/PersonListWp8Model.cs
+++ b/CampusAppWP8/CampusAppWP8/Model/Person/PersonListWp8Model.cs
@@ -21,10 +21,21 @@ namespace CampusAppWP8.Model.Person
         /// <remarks>Stubbfel, 05.09.2013.</remarks>
         /// <param name="id">The identifier.</param>
         /// <returns>The person.</returns>
-        public new PersonWp8Model GetPerson(string id)
+        /// <summary>Gets a person.</summary>
+        /// <remarks>Stubbfel, 05.09.2013.</remarks>
+        /// <param name="id">The identifier.</param>
+        /// <returns>The person.</returns>
+        public override PersonWp8Model GetPerson(string id)
         {
-            IPersonModel<IPersonFunctionModel> tmpPerson = base.GetPerson(id);
-            return tmpPerson as PersonWp8Model;
+            foreach (PersonWp8Model tmpPerson in this.Persons)
+            {
+                if (tmpPerson.ID.Equals(id))
+                {
+                    return tmpPerson;
+                }
+            }
+
+            return null;
         }
 
 
@@ -46,5 +57,15 @@ namespace CampusAppWP8.Model.Person
                 this.Persons.Remove(removePerson);
             }
         }
+
+        /// <summary>Sets person identifier to function.</summary>
+        /// <remarks>Stubbfel, 05.09.2013.</remarks>
+        public override void SetPersonIdToFunction()
+        {
+            foreach (PersonWp8Model person in this.Persons)
+            {
+                person.SetPersonIdToFunction();
+            }
+        }
     }
 }
diff --git a/CampusAppWP8/CampusAppWPortalLib8/Model/Person/PersonListModel.cs b/CampusAppWP8/CampusAppWPortalLib8/Model/Person/PersonListModel.cs
index ade93416..bed28637 100644
--- a/CampusAppWP8/CampusAppWPortalLib8/Model/Person/PersonListModel.cs
+++ b/CampusAppWP8/CampusAppWPortalLib8/Model/Person/PersonListModel.cs
@@ -31,40 +31,13 @@ namespace CampusAppWPortalLib8.Model.Person
 
         /// <summary>Sets person identifier to function.</summary>
         /// <remarks>Stubbfel, 05.09.2013.</remarks>
-        public void SetPersonIdToFunction()
-        {
-            foreach (T item in this.Persons)
-            {
-                IPersonModel<IPersonFunctionModel> person = item as IPersonModel<IPersonFunctionModel>;
-                if (person != null)
-                {
-                    person.SetPersonIdToFunction();
-                }
-            }
-        }
+        public abstract void SetPersonIdToFunction();
 
         /// <summary>Gets a person.</summary>
         /// <remarks>Stubbfel, 05.09.2013.</remarks>
         /// <param name="id">The identifier.</param>
         /// <returns>The person.</returns>
-        public IPersonModel<IPersonFunctionModel> GetPerson(string id)
-        {
-            foreach (T item in this.Persons)
-            {
-                IPersonModel<IPersonFunctionModel> tmpPerson = item as IPersonModel<IPersonFunctionModel>;
-                if (tmpPerson == null)
-                {
-                    continue;
-                }
-
-                if (tmpPerson.ID.Equals(id))
-                {
-                    return tmpPerson;
-                }
-            }
-
-            return default(IPersonModel<IPersonFunctionModel>);
-        }
+        public abstract T GetPerson(string id);
 
         /// <summary>Removes the non function and set identifiers person.</summary>
         /// <remarks>Stubbfel, 05.09.2013.</remarks>