diff --git a/Directory.Build.props b/Directory.Build.props
index 8ff52b843..6e5760037 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -66,7 +66,7 @@
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(TargetFramework)' == 'net472' Or '$(TargetFramework)' == 'net462' Or '$(TargetFramework)' == 'netstandard2.0' Or '$(TargetFramework)' == 'netcoreapp3.1'">
-    <LangVersion>10.0</LangVersion>
+    <LangVersion>11</LangVersion>
   </PropertyGroup>
 
   <PropertyGroup Label="Common dependency versions">
diff --git a/tests/DevApps/Directory.Build.props b/tests/DevApps/Directory.Build.props
index 9f6fb870e..6baadbd9a 100644
--- a/tests/DevApps/Directory.Build.props
+++ b/tests/DevApps/Directory.Build.props
@@ -5,6 +5,7 @@
      <TargetFrameworks Condition="'$(TargetNet8)' != 'True'">net6.0; net7.0</TargetFrameworks>
      <UseWip>true</UseWip>
      <IsPackable>false</IsPackable>
+     <LangVersion>11</LangVersion>
   </PropertyGroup>
 
 </Project>
diff --git a/tests/DevApps/aspnet-mvc/Directory.Build.props b/tests/DevApps/aspnet-mvc/Directory.Build.props
index 14bda85e4..6fff8d34b 100644
--- a/tests/DevApps/aspnet-mvc/Directory.Build.props
+++ b/tests/DevApps/aspnet-mvc/Directory.Build.props
@@ -1,4 +1,5 @@
 <Project>
   <PropertyGroup>
-   </PropertyGroup>
+    <LangVersion>11</LangVersion>
+  </PropertyGroup>
 </Project>
diff --git a/tests/DevApps/aspnet-mvc/OwinWebApi/OwinWebApi.csproj b/tests/DevApps/aspnet-mvc/OwinWebApi/OwinWebApi.csproj
index 847494213..dbf48b8e6 100644
--- a/tests/DevApps/aspnet-mvc/OwinWebApi/OwinWebApi.csproj
+++ b/tests/DevApps/aspnet-mvc/OwinWebApi/OwinWebApi.csproj
@@ -23,7 +23,6 @@
     <IISExpressWindowsAuthentication />
     <IISExpressUseClassicPipelineMode />
     <UseGlobalApplicationHostFile />
-    <LangVersion>8.0</LangVersion>
     <Nullable>enable</Nullable>
     <NuGetPackageImportStamp>
     </NuGetPackageImportStamp>
@@ -219,4 +218,4 @@
   </Target>
   <Target Name="AfterBuild">
   </Target> -->
-</Project>
\ No newline at end of file
+</Project>
diff --git a/tests/DevApps/daemon-app/Daemon-app/Daemon-app.csproj b/tests/DevApps/daemon-app/Daemon-app/Daemon-app.csproj
index 6cc45aa53..a0aaf2ad9 100644
--- a/tests/DevApps/daemon-app/Daemon-app/Daemon-app.csproj
+++ b/tests/DevApps/daemon-app/Daemon-app/Daemon-app.csproj
@@ -6,7 +6,7 @@
     <RootNamespace>Daemon_app</RootNamespace>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
-    <LangVersion>10.0</LangVersion>
+    <LangVersion>11</LangVersion>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
diff --git a/tests/Directory.Build.props b/tests/Directory.Build.props
index bda94b143..7821b0e5e 100644
--- a/tests/Directory.Build.props
+++ b/tests/Directory.Build.props
@@ -7,7 +7,6 @@
     <SignAssembly>True</SignAssembly>
     <IsPackable>false</IsPackable>
     <AssemblyOriginatorKeyFile>../../build/MSAL.snk</AssemblyOriginatorKeyFile>
-    <LangVersion>10.0</LangVersion>
   </PropertyGroup>
 
   <PropertyGroup Label="Common dependency versions">
diff --git a/tools/app-provisioning-tool/Directory.Build.props b/tools/app-provisioning-tool/Directory.Build.props
index 530cadaaa..152bb1bda 100644
--- a/tools/app-provisioning-tool/Directory.Build.props
+++ b/tools/app-provisioning-tool/Directory.Build.props
@@ -4,7 +4,6 @@
      <TargetFrameworks>net7.0</TargetFrameworks>
      <SignAssembly>True</SignAssembly>
      <AssemblyOriginatorKeyFile>../../../build/MSAL.snk</AssemblyOriginatorKeyFile>
-    <LangVersion>10.0</LangVersion>
   </PropertyGroup>
 
  <ItemGroup>