Use C# 12, as pipeline is using dotnet-sdk-8.0

Havret · Havret · commit f6de4bc54607 · 2025-07-06T14:01:33.000+02:00
diff --git a/Directory.build.props b/Directory.build.props
@@ -1,5 +1,5 @@
 <Project>
   <PropertyGroup>
-    <LangVersion>13</LangVersion>
+    <LangVersion>12</LangVersion>
   </PropertyGroup>
 </Project>
