diff --git a/src/SQLCE4Umbraco/SqlCE4Umbraco.csproj.DotSettings b/src/SQLCE4Umbraco/SqlCE4Umbraco.csproj.DotSettings
new file mode 100644
index 0000000000..662f95686e
--- /dev/null
+++ b/src/SQLCE4Umbraco/SqlCE4Umbraco.csproj.DotSettings
@@ -0,0 +1,2 @@
+<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/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp50</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/Umbraco.Core/Umbraco.Core.csproj.DotSettings b/src/Umbraco.Core/Umbraco.Core.csproj.DotSettings
new file mode 100644
index 0000000000..662f95686e
--- /dev/null
+++ b/src/Umbraco.Core/Umbraco.Core.csproj.DotSettings
@@ -0,0 +1,2 @@
+<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/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp50</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/Umbraco.Web.UI.Client/Umbraco.Web.UI.Client.proj.DotSettings b/src/Umbraco.Web.UI.Client/Umbraco.Web.UI.Client.proj.DotSettings
new file mode 100644
index 0000000000..662f95686e
--- /dev/null
+++ b/src/Umbraco.Web.UI.Client/Umbraco.Web.UI.Client.proj.DotSettings
@@ -0,0 +1,2 @@
+<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/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp50</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/Umbraco.Web.UI/Umbraco.Web.UI.csproj.DotSettings b/src/Umbraco.Web.UI/Umbraco.Web.UI.csproj.DotSettings
new file mode 100644
index 0000000000..662f95686e
--- /dev/null
+++ b/src/Umbraco.Web.UI/Umbraco.Web.UI.csproj.DotSettings
@@ -0,0 +1,2 @@
+<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/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp50</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/Umbraco.Web/Umbraco.Web.csproj.DotSettings b/src/Umbraco.Web/Umbraco.Web.csproj.DotSettings
new file mode 100644
index 0000000000..662f95686e
--- /dev/null
+++ b/src/Umbraco.Web/Umbraco.Web.csproj.DotSettings
@@ -0,0 +1,2 @@
+<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/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp50</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/UmbracoExamine/UmbracoExamine.csproj.DotSettings b/src/UmbracoExamine/UmbracoExamine.csproj.DotSettings
new file mode 100644
index 0000000000..662f95686e
--- /dev/null
+++ b/src/UmbracoExamine/UmbracoExamine.csproj.DotSettings
@@ -0,0 +1,2 @@
+<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/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp50</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/umbraco.MacroEngines/umbraco.MacroEngines.csproj.DotSettings b/src/umbraco.MacroEngines/umbraco.MacroEngines.csproj.DotSettings
new file mode 100644
index 0000000000..662f95686e
--- /dev/null
+++ b/src/umbraco.MacroEngines/umbraco.MacroEngines.csproj.DotSettings
@@ -0,0 +1,2 @@
+<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/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp50</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/umbraco.businesslogic/umbraco.businesslogic.csproj.DotSettings b/src/umbraco.businesslogic/umbraco.businesslogic.csproj.DotSettings
new file mode 100644
index 0000000000..662f95686e
--- /dev/null
+++ b/src/umbraco.businesslogic/umbraco.businesslogic.csproj.DotSettings
@@ -0,0 +1,2 @@
+<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/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp50</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/umbraco.cms/umbraco.cms.csproj.DotSettings b/src/umbraco.cms/umbraco.cms.csproj.DotSettings
new file mode 100644
index 0000000000..662f95686e
--- /dev/null
+++ b/src/umbraco.cms/umbraco.cms.csproj.DotSettings
@@ -0,0 +1,2 @@
+<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/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp50</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/umbraco.controls/umbraco.controls.csproj.DotSettings b/src/umbraco.controls/umbraco.controls.csproj.DotSettings
new file mode 100644
index 0000000000..662f95686e
--- /dev/null
+++ b/src/umbraco.controls/umbraco.controls.csproj.DotSettings
@@ -0,0 +1,2 @@
+<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/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp50</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/umbraco.datalayer/umbraco.datalayer.csproj.DotSettings b/src/umbraco.datalayer/umbraco.datalayer.csproj.DotSettings
new file mode 100644
index 0000000000..662f95686e
--- /dev/null
+++ b/src/umbraco.datalayer/umbraco.datalayer.csproj.DotSettings
@@ -0,0 +1,2 @@
+<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/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp50</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/umbraco.editorControls/umbraco.editorControls.csproj.DotSettings b/src/umbraco.editorControls/umbraco.editorControls.csproj.DotSettings
new file mode 100644
index 0000000000..662f95686e
--- /dev/null
+++ b/src/umbraco.editorControls/umbraco.editorControls.csproj.DotSettings
@@ -0,0 +1,2 @@
+<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/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp50</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/umbraco.interfaces/umbraco.interfaces.csproj.DotSettings b/src/umbraco.interfaces/umbraco.interfaces.csproj.DotSettings
new file mode 100644
index 0000000000..662f95686e
--- /dev/null
+++ b/src/umbraco.interfaces/umbraco.interfaces.csproj.DotSettings
@@ -0,0 +1,2 @@
+<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/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp50</s:String></wpf:ResourceDictionary>
\ No newline at end of file