diff --git a/VectoCore/VectoCore/InputData/Reader/DataObjectAdapter/PrimaryBus/DeclarationDataAdapterPrimaryBus.cs b/VectoCore/VectoCore/InputData/Reader/DataObjectAdapter/PrimaryBus/DeclarationDataAdapterPrimaryBus.cs
index cccfe44a5da42f79e1736163b36010591bf903ef..f4ab788f21fadc7adcbeaca5a40d54de74ac346c 100644
--- a/VectoCore/VectoCore/InputData/Reader/DataObjectAdapter/PrimaryBus/DeclarationDataAdapterPrimaryBus.cs
+++ b/VectoCore/VectoCore/InputData/Reader/DataObjectAdapter/PrimaryBus/DeclarationDataAdapterPrimaryBus.cs
@@ -266,8 +266,7 @@ namespace TUGraz.VectoCore.InputData.Reader.DataObjectAdapter.PrimaryBus
 
 			#region Overrides of PrimaryBusBase
 
-			// ReSharper disable once UseArrayEmptyMethod //not supported in net45
-			public override GearboxType[] SupportedGearboxTypes => new GearboxType[0];
+			public override GearboxType[] SupportedGearboxTypes => Array.Empty<GearboxType>();
 
 			#endregion
 		}
diff --git a/VectoCore/VectoCore/OutputData/XML/GroupWriter/Declaration/Vehicle/Components/Auxiliaries/BusAuxHVACConventionalGroupWriter.cs b/VectoCore/VectoCore/OutputData/XML/GroupWriter/Declaration/Vehicle/Components/Auxiliaries/BusAuxHVACConventionalGroupWriter.cs
index dda6fb22a7a48328ab244521383483b5de5c63f7..b1fc4ce19725eedea8e2aad9e7f33848df7c7a67 100644
--- a/VectoCore/VectoCore/OutputData/XML/GroupWriter/Declaration/Vehicle/Components/Auxiliaries/BusAuxHVACConventionalGroupWriter.cs
+++ b/VectoCore/VectoCore/OutputData/XML/GroupWriter/Declaration/Vehicle/Components/Auxiliaries/BusAuxHVACConventionalGroupWriter.cs
@@ -48,19 +48,9 @@ namespace TUGraz.VectoCore.OutputData.XML.GroupWriter.Declaration.Vehicle.Compon
 				.GetBusAuxiliariesDeclarationGroupWriter(GroupNames.BusAuxHVACHeatPumpSequenceGroup, _writerNamespace)
 				.GetGroupElements(aux);
 
-#if NET45
-			foreach (var e in groupElements) {
-				elements.Add(e);
-			}
-#else
 			elements.AddRange(groupElements);
 
-#endif
-
-
-
-
-            elements.Add(new XElement(_writerNamespace + XMLNames.Bus_AuxiliaryHeaterPower,
+			elements.Add(new XElement(_writerNamespace + XMLNames.Bus_AuxiliaryHeaterPower,
 				aux.HVACAux.AuxHeaterPower?.ToXMLFormat(0)));
 			elements.Add(new XElement(_writerNamespace + XMLNames.Bus_DoubleGlazing, aux.HVACAux.DoubleGlazing));
 			elements.Add(new XElement(_writerNamespace + XMLNames.Bus_AdjustableAuxiliaryHeater,