upgrade to c# 13 (#2998)

Author: westin-m

benchmark/Microsoft.IdentityModel.Benchmarks/Microsoft.IdentityModel.Benchmarks.csproj

@@ -11,7 +11,7 @@
     <AssemblyOriginatorKeyFile>$(MSBuildThisFileDirectory)..\..\build\35MSSharedLib1024.snk</AssemblyOriginatorKeyFile>
     <ErrorOnDuplicatePublishOutputFiles>False</ErrorOnDuplicatePublishOutputFiles>
     <IsPackable>false</IsPackable>
-    <LangVersion>12</LangVersion>
+    <LangVersion>13</LangVersion>
   </PropertyGroup>
 
   <!-- Uncomment only when running EtwProfiler diagnoser on Release-->

build/common.props

@@ -27,7 +27,7 @@
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
     <TargetFrameworks>$(SrcTargets)</TargetFrameworks>
     <NetStandardImplicitPackageVersion>$(NetStandardVersion)</NetStandardImplicitPackageVersion>
-    <LangVersion>12</LangVersion>
+    <LangVersion>13</LangVersion>
     <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
   </PropertyGroup>
 

build/commonTest.props

@@ -16,7 +16,7 @@
     <TargetFrameworks>$(TestTargets)</TargetFrameworks>
     <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp2.1'">$(DotNetCoreAppRuntimeVersion)</RuntimeFrameworkVersion>
     <IsPackable>false</IsPackable>
-    <LangVersion>12</LangVersion>
+    <LangVersion>13</LangVersion>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
   </PropertyGroup>