Try langversion 12

JimBobSquarePants · JimBobSquarePants · commit f63e1a4f6063 · 2025-02-26T23:13:37.000+10:00
diff --git a/Directory.Build.props b/Directory.Build.props
@@ -23,7 +23,7 @@
 
   <PropertyGroup Condition="$(SIXLABORS_TESTING_PREVIEW) == true">
     <!-- Workaround various issues bound to implicit language features. -->
-    <LangVersion>13.0</LangVersion>
+    <LangVersion>12.0</LangVersion>
   </PropertyGroup>
 
   <!--
