From b42a5667022d4e0848b6c8fe2ae52a9ef256d456 Mon Sep 17 00:00:00 2001
From: UJJWAL CHADHA <ujchadha@microsoft.com>
Date: Mon, 15 Nov 2021 11:01:20 -0800
Subject: [PATCH] Remove IDIC attribute from exclusive interfaces

---
 src/cswinrt/code_writers.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/cswinrt/code_writers.h b/src/cswinrt/code_writers.h
index ddf780040..f002e7d40 100644
--- a/src/cswinrt/code_writers.h
+++ b/src/cswinrt/code_writers.h
@@ -5663,13 +5663,14 @@ public static Guid PIID = Vftbl.PIID;
         std::map<std::string, required_interface> required_interfaces;
         write_required_interface_members_for_abi_type(w, type, required_interfaces, false);
 
-        w.write(R"([DynamicInterfaceCastableImplementation]
+        w.write(R"(%
 %
 internal unsafe interface % : %
 {
 %%%%%}
 )",
 // Interface abi implementation
+            is_exclusive_to(type) ? "" : "[DynamicInterfaceCastableImplementation]",
             bind<write_guid_attribute>(type),
             type_name,
             bind<write_type_name>(type, typedef_name_type::CCW, false),