[Infra] Support C# 9.0

reegeek · reegeek · commit 4646ee5821aa · 2021-01-28T11:36:14.000+01:00
diff --git a/Build/Common.props b/Build/Common.props
@@ -15,7 +15,7 @@
   </PropertyGroup>
 
   <PropertyGroup Label="Common properties">
-    <LangVersion>8.0</LangVersion>
+    <LangVersion>9.0</LangVersion>
     <CheckEolTargetFramework>false</CheckEolTargetFramework>
   </PropertyGroup>
 
