diff --git a/src/Razor/Microsoft.NET.Sdk.Razor/src/Sdk/Sdk.Razor.StaticAssets.ProjectSystem.props b/src/Razor/Microsoft.NET.Sdk.Razor/src/Sdk/Sdk.Razor.StaticAssets.ProjectSystem.props
index f54b74ebf4..beb01baa38 100644
--- a/src/Razor/Microsoft.NET.Sdk.Razor/src/Sdk/Sdk.Razor.StaticAssets.ProjectSystem.props
+++ b/src/Razor/Microsoft.NET.Sdk.Razor/src/Sdk/Sdk.Razor.StaticAssets.ProjectSystem.props
@@ -28,8 +28,13 @@ Copyright (c) .NET Foundation. All rights reserved.
   <ItemGroup Condition="'$(EnableDefaultItems)' == 'true' And '$(EnableDefaultContentItems)' == 'true' ">
     <!-- Publish everything under wwwroot, all JSON files, all config files and all Razor files -->
     <Content Include="wwwroot\**" ExcludeFromSingleFile="true" CopyToPublishDirectory="PreserveNewest" Exclude="$(DefaultItemExcludes);$(DefaultExcludesInProjectFolder)" />
-    <Content Include="**\*.config" ExcludeFromSingleFile="true" CopyToOutputDirectory="PreserveNewest" CopyToPublishDirectory="PreserveNewest" Exclude="$(DefaultItemExcludes);$(DefaultExcludesInProjectFolder);$(DefaultWebContentItemExcludes)" />
-    <Content Include="**\*.json" ExcludeFromSingleFile="true" CopyToOutputDirectory="PreserveNewest" CopyToPublishDirectory="PreserveNewest" Exclude="$(DefaultItemExcludes);$(DefaultExcludesInProjectFolder);$(DefaultWebContentItemExcludes)" />
+
+    <Content Include="**\*.config" ExcludeFromSingleFile="true" CopyToOutputDirectory="PreserveNewest" CopyToPublishDirectory="PreserveNewest" Exclude="$(DefaultItemExcludes);$(DefaultExcludesInProjectFolder);$(DefaultWebContentItemExcludes)" Condition="'$(ExcludeConfigFilesFromBuildOutput)'!='true'" />
+    <Content Include="**\*.json" ExcludeFromSingleFile="true" CopyToOutputDirectory="PreserveNewest" CopyToPublishDirectory="PreserveNewest" Exclude="$(DefaultItemExcludes);$(DefaultExcludesInProjectFolder);$(DefaultWebContentItemExcludes)" Condition="'$(ExcludeConfigFilesFromBuildOutput)'!='true'" />
+
+    <!-- When ExcludeConfigFilesFromBuildOutput is set, do not copy .,config, .json files to the build output directory. -->
+    <Content Include="**\*.config" ExcludeFromSingleFile="true" CopyToPublishDirectory="PreserveNewest" Exclude="$(DefaultItemExcludes);$(DefaultExcludesInProjectFolder);$(DefaultWebContentItemExcludes)" Condition="'$(ExcludeConfigFilesFromBuildOutput)'=='true'" />
+    <Content Include="**\*.json" ExcludeFromSingleFile="true" CopyToPublishDirectory="PreserveNewest" Exclude="$(DefaultItemExcludes);$(DefaultExcludesInProjectFolder);$(DefaultWebContentItemExcludes)" Condition="'$(ExcludeConfigFilesFromBuildOutput)'=='true'" />
 
     <!-- Set CopyToPublishDirectory to Never for items under AppDesignerFolder ("Properties", by default) to avoid publishing launchSettings.json -->
     <Content Update="$(AppDesignerFolder)\**" CopyToPublishDirectory="Never" Condition="'$(AppDesignerFolder)' != ''"/>
diff --git a/src/Razor/Microsoft.NET.Sdk.Razor/test/IntegrationTests/BuildIntrospectionTest.cs b/src/Razor/Microsoft.NET.Sdk.Razor/test/IntegrationTests/BuildIntrospectionTest.cs
index 2c86bf957c..fcb33acbf2 100644
--- a/src/Razor/Microsoft.NET.Sdk.Razor/test/IntegrationTests/BuildIntrospectionTest.cs
+++ b/src/Razor/Microsoft.NET.Sdk.Razor/test/IntegrationTests/BuildIntrospectionTest.cs
@@ -207,5 +207,19 @@ namespace Microsoft.AspNetCore.Razor.Design.IntegrationTests
             Assert.BuildOutputContainsLine(result, "Content: appsettings.json CopyToOutputDirectory=PreserveNewest CopyToPublishDirectory=PreserveNewest ExcludeFromSingleFile=true");
             Assert.BuildOutputContainsLine(result, "Content: appsettings.Development.json CopyToOutputDirectory=PreserveNewest CopyToPublishDirectory=PreserveNewest ExcludeFromSingleFile=true");
         }
+
+        [Fact]
+        [InitializeTestProject("SimpleMvc")]
+        public async Task IntrospectJsonContentFiles_WithExcludeConfigFilesFromBuildOutputSet()
+        {
+            // Verifies that the fix for https://github.com/aspnet/AspNetCore/issues/14017 works.
+            var result = await DotnetMSBuild("_IntrospectContentItems", "/p:ExcludeConfigFilesFromBuildOutput=true");
+
+            Assert.BuildPassed(result);
+            var launchSettingsPath = Path.Combine("Properties", "launchSettings.json");
+            Assert.BuildOutputContainsLine(result, $"Content: {launchSettingsPath} CopyToOutputDirectory= CopyToPublishDirectory=Never ExcludeFromSingleFile=true");
+            Assert.BuildOutputContainsLine(result, "Content: appsettings.json CopyToOutputDirectory= CopyToPublishDirectory=PreserveNewest ExcludeFromSingleFile=true");
+            Assert.BuildOutputContainsLine(result, "Content: appsettings.Development.json CopyToOutputDirectory= CopyToPublishDirectory=PreserveNewest ExcludeFromSingleFile=true");
+        }
     }
 }