Define OR_GREATER constants in msbuild

Author: TheAngryByrd

Directory.Build.props

@@ -35,4 +35,10 @@
         <IncludeSourceRevisionInInformationalVersion>false</IncludeSourceRevisionInInformationalVersion>
         <EmbedUntrackedSources>true</EmbedUntrackedSources>
     </PropertyGroup>
+
+    <PropertyGroup>
+        <NET6_0_OR_GREATER Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)','net6.0'))">true</NET6_0_OR_GREATER>
+        <NET9_0_OR_GREATER Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)','net9.0'))">true</NET9_0_OR_GREATER>
+        <NET10_0_OR_GREATER Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)','net10.0'))">true</NET10_0_OR_GREATER>
+    </PropertyGroup>
 </Project>