Use the AutoGenerateEntryPoint property as defined in the props file

Author: davidwengier

src/System.CommandLine.DragonFruit/targets/System.CommandLine.DragonFruit.targets

@@ -1,14 +1,14 @@
 <Project>
 
-  <PropertyGroup Condition="'$(DisableAutoGeneratedMain)' != 'true'">
+  <PropertyGroup Condition="'$(AutoGenerateEntryPoint)' == 'true'">
     <!-- The location of the generated program file. -->
     <_GeneratedEntryPointFile>$(IntermediateOutputPath)$(MSBuildProjectName).Program.g$(DefaultLanguageSourceExtension)</_GeneratedEntryPointFile>
   </PropertyGroup>
 
   <Target Name="_GenerateRealEntryPointType"
           BeforeTargets="CoreCompile"
           DependsOnTargets="PrepareForBuild;CoreGenerateDragonFruitProgramFile"
-          Condition="'$(DisableAutoGeneratedMain)' != 'true'">
+          Condition="'$(AutoGenerateEntryPoint)' == 'true'">
     <PropertyGroup>
       <StartupObject>AutoGeneratedProgram</StartupObject>
     </PropertyGroup>