Merge remote-tracking branch 'libtemplate/main' into sdkUpdate8

Author: AArnott

.devcontainer/Dockerfile

@@ -1,5 +1,5 @@
 # Refer to https://hub.docker.com/_/microsoft-dotnet-sdk for available versions
-FROM mcr.microsoft.com/dotnet/sdk:7.0.401-jammy
+FROM mcr.microsoft.com/dotnet/sdk:8.0.100-jammy
 
 # Installing mono makes `dotnet test` work without errors even for net472.
 # But installing it takes a long time, so it's excluded by default.

Directory.Build.props

@@ -6,7 +6,7 @@
     <BaseOutputPath Condition=" '$(BaseOutputPath)' == '' ">$(RepoRootPath)bin\$(MSBuildProjectName)\</BaseOutputPath>
     <PackageOutputPath>$(RepoRootPath)bin\Packages\$(Configuration)\</PackageOutputPath>
     <DocumentationRootFolder>$(MSBuildThisFileDirectory)..\wiki\api</DocumentationRootFolder>
-    <LangVersion>11</LangVersion>
+    <LangVersion>12</LangVersion>
     <!--<Nullable>enable</Nullable>-->
     <ImplicitUsings>enable</ImplicitUsings>
     <AnalysisLevel>latest</AnalysisLevel>

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "7.0.401",
+    "version": "8.0.100",
     "rollForward": "patch",
     "allowPrerelease": false
   }