diff --git a/Algorithm.CSharp/QuantConnect.Algorithm.CSharp.csproj b/Algorithm.CSharp/QuantConnect.Algorithm.CSharp.csproj
index 6e4a7865cec4..a176282c1cd3 100644
--- a/Algorithm.CSharp/QuantConnect.Algorithm.CSharp.csproj
+++ b/Algorithm.CSharp/QuantConnect.Algorithm.CSharp.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>QuantConnect.Algorithm.CSharp</AssemblyName>
     <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <TargetFrameworkProfile />
     <NuGetPackageImportStamp>
     </NuGetPackageImportStamp>
diff --git a/Algorithm.Java/QuantConnect.Algorithm.Java.csproj b/Algorithm.Java/QuantConnect.Algorithm.Java.csproj
index a0050193e460..547e8d9679d5 100644
--- a/Algorithm.Java/QuantConnect.Algorithm.Java.csproj
+++ b/Algorithm.Java/QuantConnect.Algorithm.Java.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>QuantConnect.Algorithm.Java</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
diff --git a/Algorithm.Python/QuantConnect.Algorithm.Python.csproj b/Algorithm.Python/QuantConnect.Algorithm.Python.csproj
index f772ed0cc68f..c13d3f91d45e 100644
--- a/Algorithm.Python/QuantConnect.Algorithm.Python.csproj
+++ b/Algorithm.Python/QuantConnect.Algorithm.Python.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>QuantConnect.Algorithm.Python</AssemblyName>
     <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/Algorithm/QuantConnect.Algorithm.csproj b/Algorithm/QuantConnect.Algorithm.csproj
index 4b61fb54494b..a10aa0758fa5 100644
--- a/Algorithm/QuantConnect.Algorithm.csproj
+++ b/Algorithm/QuantConnect.Algorithm.csproj
@@ -14,7 +14,7 @@
     <FileAlignment>512</FileAlignment>
     <TargetFrameworkProfile />
     <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\</SolutionDir>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
diff --git a/AlgorithmFactory/QuantConnect.AlgorithmFactory.csproj b/AlgorithmFactory/QuantConnect.AlgorithmFactory.csproj
index 59aff9fd8e50..f56125f3fc5f 100644
--- a/AlgorithmFactory/QuantConnect.AlgorithmFactory.csproj
+++ b/AlgorithmFactory/QuantConnect.AlgorithmFactory.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>QuantConnect.AlgorithmFactory</AssemblyName>
     <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/Api/QuantConnect.Api.csproj b/Api/QuantConnect.Api.csproj
index 17fbab7c564e..92820f465758 100644
--- a/Api/QuantConnect.Api.csproj
+++ b/Api/QuantConnect.Api.csproj
@@ -15,7 +15,7 @@
     <TargetFrameworkProfile />
     <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\</SolutionDir>
     <RestorePackages>true</RestorePackages>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
diff --git a/Brokerages/QuantConnect.Brokerages.csproj b/Brokerages/QuantConnect.Brokerages.csproj
index 6a51e4add2e5..37d9220551af 100644
--- a/Brokerages/QuantConnect.Brokerages.csproj
+++ b/Brokerages/QuantConnect.Brokerages.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>QuantConnect.Brokerages</AssemblyName>
     <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/Common/QuantConnect.csproj b/Common/QuantConnect.csproj
index 3ed96aa1a439..6ab5b5f21536 100644
--- a/Common/QuantConnect.csproj
+++ b/Common/QuantConnect.csproj
@@ -16,7 +16,7 @@
     </TargetFrameworkProfile>
     <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\</SolutionDir>
     <RestorePackages>true</RestorePackages>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
diff --git a/Compression/QuantConnect.Compression.csproj b/Compression/QuantConnect.Compression.csproj
index fd00296f4c55..8e687c0d9244 100644
--- a/Compression/QuantConnect.Compression.csproj
+++ b/Compression/QuantConnect.Compression.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>QuantConnect.Compression</AssemblyName>
     <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/Configuration/QuantConnect.Configuration.csproj b/Configuration/QuantConnect.Configuration.csproj
index 5928bc6a7db1..9d4721102c44 100644
--- a/Configuration/QuantConnect.Configuration.csproj
+++ b/Configuration/QuantConnect.Configuration.csproj
@@ -14,7 +14,7 @@
     <TargetFrameworkProfile />
     <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\</SolutionDir>
     <RestorePackages>true</RestorePackages>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
diff --git a/Engine/QuantConnect.Lean.Engine.csproj b/Engine/QuantConnect.Lean.Engine.csproj
index efe5a08bfefe..4f305c060e27 100644
--- a/Engine/QuantConnect.Lean.Engine.csproj
+++ b/Engine/QuantConnect.Lean.Engine.csproj
@@ -31,7 +31,7 @@
     <IsWebBootstrapper>false</IsWebBootstrapper>
     <UseApplicationTrust>false</UseApplicationTrust>
     <BootstrapperEnabled>true</BootstrapperEnabled>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' ">
     <PlatformTarget>AnyCPU</PlatformTarget>
diff --git a/Indicators/QuantConnect.Indicators.csproj b/Indicators/QuantConnect.Indicators.csproj
index bd6fc5408d47..2bcddd9326a1 100644
--- a/Indicators/QuantConnect.Indicators.csproj
+++ b/Indicators/QuantConnect.Indicators.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>QuantConnect.Indicators</AssemblyName>
     <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/Launcher/QuantConnect.Lean.Launcher.csproj b/Launcher/QuantConnect.Lean.Launcher.csproj
index 9511db1d317d..d9d3538e77c9 100644
--- a/Launcher/QuantConnect.Lean.Launcher.csproj
+++ b/Launcher/QuantConnect.Lean.Launcher.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>QuantConnect.Lean.Launcher</AssemblyName>
     <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <NuGetPackageImportStamp>
     </NuGetPackageImportStamp>
     <TargetFrameworkProfile />
diff --git a/Logging/QuantConnect.Logging.csproj b/Logging/QuantConnect.Logging.csproj
index 360c03281543..8762d35cdee0 100644
--- a/Logging/QuantConnect.Logging.csproj
+++ b/Logging/QuantConnect.Logging.csproj
@@ -15,7 +15,7 @@
     <TargetFrameworkProfile />
     <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\</SolutionDir>
     <RestorePackages>true</RestorePackages>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
diff --git a/Messaging/QuantConnect.Messaging.csproj b/Messaging/QuantConnect.Messaging.csproj
index 922b8f2b48d5..f894d24105ee 100644
--- a/Messaging/QuantConnect.Messaging.csproj
+++ b/Messaging/QuantConnect.Messaging.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>QuantConnect.Messaging</AssemblyName>
     <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/Queues/QuantConnect.Queues.csproj b/Queues/QuantConnect.Queues.csproj
index 6a22f9572290..e5c0817d8fd9 100644
--- a/Queues/QuantConnect.Queues.csproj
+++ b/Queues/QuantConnect.Queues.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>QuantConnect.Queues</AssemblyName>
     <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/Tests/QuantConnect.Tests.csproj b/Tests/QuantConnect.Tests.csproj
index 448bf9f1f8d5..bfae62abc060 100644
--- a/Tests/QuantConnect.Tests.csproj
+++ b/Tests/QuantConnect.Tests.csproj
@@ -13,7 +13,7 @@
     <FileAlignment>512</FileAlignment>
     <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\</SolutionDir>
     <RestorePackages>true</RestorePackages>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/ToolBox/QuantConnect.ToolBox.csproj b/ToolBox/QuantConnect.ToolBox.csproj
index a69dfb1aa3d0..3a970836f476 100644
--- a/ToolBox/QuantConnect.ToolBox.csproj
+++ b/ToolBox/QuantConnect.ToolBox.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>QuantConnect.ToolBox</AssemblyName>
     <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/UserInterface/QuantConnect.Views.csproj b/UserInterface/QuantConnect.Views.csproj
index 37309405210f..3dadf99457bb 100644
--- a/UserInterface/QuantConnect.Views.csproj
+++ b/UserInterface/QuantConnect.Views.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>QuantConnect.Views</AssemblyName>
     <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <NuGetPackageImportStamp>
     </NuGetPackageImportStamp>
     <TargetFrameworkProfile />
@@ -46,7 +46,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <DebugType>full</DebugType>
     <PlatformTarget>x64</PlatformTarget>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <ErrorReport>prompt</ErrorReport>
     <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
     <Prefer32Bit>true</Prefer32Bit>
@@ -57,7 +57,7 @@
     <Optimize>true</Optimize>
     <DebugType>pdbonly</DebugType>
     <PlatformTarget>x64</PlatformTarget>
-    <LangVersion>5</LangVersion>
+    <LangVersion>6</LangVersion>
     <ErrorReport>prompt</ErrorReport>
     <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
     <Prefer32Bit>true</Prefer32Bit>