Index: Ringtoets.sln.DotSettings
===================================================================
diff -u -r308e44c50fc1f235b99663e3ab6a8f309a4cc3cb -r19ef4481d2b4bbf259909a15d68e28a9e322b8b9
--- Ringtoets.sln.DotSettings	(.../Ringtoets.sln.DotSettings)	(revision 308e44c50fc1f235b99663e3ab6a8f309a4cc3cb)
+++ Ringtoets.sln.DotSettings	(.../Ringtoets.sln.DotSettings)	(revision 19ef4481d2b4bbf259909a15d68e28a9e322b8b9)
@@ -1,5 +1,6 @@
 <wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=AccessToDisposedClosure/@EntryIndexedValue">DO_NOT_SHOW</s:String>
+    <s:String x:Key="/Default/CodeInspection/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp60</s:String> 
 	<s:String x:Key="/Default/Environment/InjectedLayers/FileInjectedLayer/=50E69DC4C3978848A077583BB293BF73/RelativePath/@EntryValue">..\Ringtoets.DotSettings</s:String>
 	<s:Boolean x:Key="/Default/Environment/InjectedLayers/FileInjectedLayer/=50E69DC4C3978848A077583BB293BF73/@KeyIndexDefined">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/InjectedLayers/InjectedLayerCustomization/=File50E69DC4C3978848A077583BB293BF73/@KeyIndexDefined">True</s:Boolean>