From 57dc70b0d2cb932bf44d73bcd6984de9352802c2 Mon Sep 17 00:00:00 2001
From: Lucas Trzesniewski <lucas.trzesniewski@gmail.com>
Date: Tue, 7 Jul 2020 12:40:06 +0200
Subject: [PATCH] Don't add duplicate FrameworkReference

---
 .../Source/src/System.Reactive/build/System.Reactive.targets  | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Rx.NET/Source/src/System.Reactive/build/System.Reactive.targets b/Rx.NET/Source/src/System.Reactive/build/System.Reactive.targets
index 7e6678573d..355f1de2fe 100644
--- a/Rx.NET/Source/src/System.Reactive/build/System.Reactive.targets
+++ b/Rx.NET/Source/src/System.Reactive/build/System.Reactive.targets
@@ -7,6 +7,6 @@
     <Reference Condition="'$(UseWindowsRxVersion)' == 'true' "  Include="$(MSBuildThisFileDirectory)..\..\build\netcoreapp3.0\System.Reactive.dll" />
     <Reference Condition="'$(UseWindowsRxVersion)' != 'true' "  Include="$(MSBuildThisFileDirectory)..\..\lib\netstandard2.0\System.Reactive.dll" />
 
-    <FrameworkReference Condition="'$(UseWindowsRxVersion)' == 'true' " Include="Microsoft.WindowsDesktop.App" />
+    <FrameworkReference Include="Microsoft.WindowsDesktop.App" Condition="'$(UseWindowsRxVersion)' == 'true' and !@(FrameworkReference->AnyHaveMetadataValue('Identity', 'Microsoft.WindowsDesktop.App'))" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>