Reverts #3122 (b8ef22b). (#3143)

This is no longer needed #3122 (comment).

Author: cincuranet

src/benchmarks/micro/MicroBenchmarks.Common.props

@@ -20,9 +20,37 @@
     <!-- Allow building with one major version, and running using a sdk with a higher major version -->
     <RollForward Condition="'$(BuildingForWasm)' == 'true'">LatestMajor</RollForward>
   </PropertyGroup>
-
-  <Import Project="$(MSBuildThisFileDirectory)MicroBenchmarks.Common.props" />
-
+  <!-- out-of-band packages that are not included in NetCoreApp have TFM-specific versions -->
+  <Choose>
+    <When Condition="'$(TargetFramework)' == 'net6.0'">
+        <PropertyGroup>
+            <LangVersion>10.0</LangVersion>
+            <ExtensionsVersion>6.0.0</ExtensionsVersion>
+            <SystemVersion>6.0.0</SystemVersion>
+        </PropertyGroup>
+    </When>
+    <When Condition="'$(TargetFramework)' == 'net7.0'">
+        <PropertyGroup>
+            <LangVersion>11.0</LangVersion>
+            <ExtensionsVersion>7.0.0</ExtensionsVersion>
+            <SystemVersion>7.0.0</SystemVersion>
+        </PropertyGroup>
+    </When>
+    <When Condition="'$(TargetFramework)' == 'net8.0'">
+        <PropertyGroup>
+            <LangVersion>preview</LangVersion>
+            <ExtensionsVersion>8.0.*-*</ExtensionsVersion>
+            <SystemVersion>8.0.*-*</SystemVersion>
+        </PropertyGroup>
+    </When>
+    <Otherwise>
+        <!-- when comparing against Full .NET Framework we are usually interested in CLR differences, so net462 belongs to this block -->
+        <PropertyGroup>
+            <ExtensionsVersion>7.0.0</ExtensionsVersion>
+            <SystemVersion>7.0.0</SystemVersion>
+        </PropertyGroup>
+    </Otherwise>
+  </Choose>
   <ItemGroup>
     <PackageReference Include="Jil" Version="3.0.0-alpha2" />
     <PackageReference Include="MessagePack" Version="1.9.11" />