diff --git a/src/libraries/Microsoft.Win32.SystemEvents/Directory.Build.props b/src/libraries/Microsoft.Win32.SystemEvents/Directory.Build.props
index 1f1da63db954b7..5e287db1f7dbf5 100644
--- a/src/libraries/Microsoft.Win32.SystemEvents/Directory.Build.props
+++ b/src/libraries/Microsoft.Win32.SystemEvents/Directory.Build.props
@@ -2,7 +2,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <StrongNameKeyId>Open</StrongNameKeyId>
-    <IsAspNetCoreApp>true</IsAspNetCoreApp>
     <IsWindowsSpecific>true</IsWindowsSpecific>
     <PackageDescription>Provides access to Windows system event notifications.
 
diff --git a/src/libraries/System.Drawing.Common/Directory.Build.props b/src/libraries/System.Drawing.Common/Directory.Build.props
index 1b6fc7d5280cc7..addd07be3bbd84 100644
--- a/src/libraries/System.Drawing.Common/Directory.Build.props
+++ b/src/libraries/System.Drawing.Common/Directory.Build.props
@@ -2,7 +2,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <StrongNameKeyId>Open</StrongNameKeyId>
-    <IsAspNetCoreApp>true</IsAspNetCoreApp>
     <IncludePlatformAttributes>true</IncludePlatformAttributes>
     <UnsupportedOSPlatforms>browser</UnsupportedOSPlatforms>
     <PackageDescription>Provides access to GDI+ graphics functionality.
diff --git a/src/libraries/System.Security.Permissions/Directory.Build.props b/src/libraries/System.Security.Permissions/Directory.Build.props
index e909821a60101e..556775dda5fa1e 100644
--- a/src/libraries/System.Security.Permissions/Directory.Build.props
+++ b/src/libraries/System.Security.Permissions/Directory.Build.props
@@ -2,7 +2,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <StrongNameKeyId>Open</StrongNameKeyId>
-    <IsAspNetCoreApp>true</IsAspNetCoreApp>
     <IncludePlatformAttributes>true</IncludePlatformAttributes>
     <PackageDescription>Provides types supporting Code Access Security (CAS).</PackageDescription>
   </PropertyGroup>
diff --git a/src/libraries/System.Windows.Extensions/Directory.Build.props b/src/libraries/System.Windows.Extensions/Directory.Build.props
index 6016faf1986578..7a9f6a073150ac 100644
--- a/src/libraries/System.Windows.Extensions/Directory.Build.props
+++ b/src/libraries/System.Windows.Extensions/Directory.Build.props
@@ -2,7 +2,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <StrongNameKeyId>Open</StrongNameKeyId>
-    <IsAspNetCoreApp>true</IsAspNetCoreApp>
     <IsWindowsSpecific>true</IsWindowsSpecific>
     <PackageDescription>Provides miscellaneous Windows-specific types