diff --git a/src/System.Private.Windows.Core/src/System.Private.Windows.Core.csproj b/src/System.Private.Windows.Core/src/System.Private.Windows.Core.csproj
index a57794cc65a..93daffd0b4c 100644
--- a/src/System.Private.Windows.Core/src/System.Private.Windows.Core.csproj
+++ b/src/System.Private.Windows.Core/src/System.Private.Windows.Core.csproj
@@ -21,6 +21,9 @@
SYSLIB5005: System.Formats.Nrbf is experimental
-->
$(NoWarn);CS3016;SYSLIB5005
+
+
+ $(NoWarn);IDE0031
true
true
false
diff --git a/src/System.Windows.Forms/System.Windows.Forms.csproj b/src/System.Windows.Forms/System.Windows.Forms.csproj
index 7c7a3233561..fd294943381 100644
--- a/src/System.Windows.Forms/System.Windows.Forms.csproj
+++ b/src/System.Windows.Forms/System.Windows.Forms.csproj
@@ -15,6 +15,8 @@
SYSLIB5005: System.Formats.Nrbf is experimental
-->
$(NoWarn);SYSLIB5005
+
+ $(NoWarn);IDE0031
Resources\System\Windows\Forms\XPThemes.manifest
true
true