Merge common code base for DBReferenceCollection (#2403)

Author: Javad Rahnama

src/Microsoft.Data.SqlClient/netcore/src/Common/src/Microsoft/Data/ProviderBase/DbReferenceCollection.cs

@@ -519,6 +519,9 @@
     <Compile Include="$(CommonSourceRoot)System\Diagnostics\CodeAnalysis.cs">
       <Link>Common\System\Diagnostics\CodeAnalysis.cs</Link>
     </Compile>
+     <Compile Include="$(CommonSourceRoot)\Microsoft\Data\ProviderBase\DbReferenceCollection.cs">
+      <Link>Microsoft\Data\ProviderBase\DbReferenceCollection.cs</Link>
+    </Compile>
   </ItemGroup>
   <ItemGroup Condition="'$(TargetGroup)' == 'netstandard' OR '$(TargetGroup)' == 'netcoreapp' OR '$(IsUAPAssembly)' == 'true'">
     <Compile Include="Microsoft.Data.SqlClient.TypeForwards.cs" />
@@ -616,9 +619,6 @@
     <Compile Include="$(CommonPath)\Microsoft\Data\ProviderBase\DbConnectionInternal.cs">
       <Link>Common\Microsoft\Data\ProviderBase\DbConnectionInternal.cs</Link>
     </Compile>
-    <Compile Include="$(CommonPath)\Microsoft\Data\ProviderBase\DbReferenceCollection.cs">
-      <Link>Common\Microsoft\Data\ProviderBase\DbReferenceCollection.cs</Link>
-    </Compile>
     <Compile Include="$(CommonPath)\System\NotImplemented.cs" />
     <Compile Include="Interop\SNINativeMethodWrapper.Common.cs" />
     <Compile Include="Microsoft\Data\Common\DbConnectionOptions.cs" />

src/Microsoft.Data.SqlClient/netcore/src/Microsoft.Data.SqlClient.csproj

@@ -609,6 +609,9 @@
     <Compile Include="$(CommonSourceRoot)Resources\ResDescriptionAttribute.cs">
       <Link>Resources\ResDescriptionAttribute.cs</Link>
     </Compile>
+    <Compile Include="$(CommonSourceRoot)\Microsoft\Data\ProviderBase\DbReferenceCollection.cs">
+      <Link>Microsoft\Data\ProviderBase\DbReferenceCollection.cs</Link>
+    </Compile>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Common\src\Microsoft\Data\Common\NameValuePermission.cs" />
@@ -630,7 +633,6 @@
     <Compile Include="Microsoft\Data\ProviderBase\DbConnectionPool.cs" />
     <Compile Include="Microsoft\Data\ProviderBase\DbConnectionPoolCounters.cs" />
     <Compile Include="Microsoft\Data\ProviderBase\DbConnectionPoolIdentity.cs" />
-    <Compile Include="Microsoft\Data\ProviderBase\DbReferenceCollection.cs" />
     <Compile Include="Microsoft\Data\RelationshipConverter.cs" />
     <Compile Include="Microsoft\Data\SqlClient\AlwaysEncryptedKeyConverter.Cng.cs" />
     <Compile Include="Microsoft\Data\SqlClient\assemblycache.cs" />