diff --git a/eng/CodeGen.proj b/eng/CodeGen.proj
index 799c20e07c08..afcecf3cb6b1 100644
--- a/eng/CodeGen.proj
+++ b/eng/CodeGen.proj
@@ -23,6 +23,7 @@
     <ItemGroup>
       <_SharedFrameworkAndPackageRef Include="@(_ProjectReferenceProvider->WithMetadataValue('IsAspNetCoreApp','true')->WithMetadataValue('IsPackable', 'true')->Distinct())" />
       <_SharedFrameworkRef Include="@(_ProjectReferenceProvider->WithMetadataValue('IsAspNetCoreApp','true')->WithMetadataValue('IsPackable', 'false')->Distinct())" />
+      <_TrimmableProject Include="@(_ProjectReferenceProvider->WithMetadataValue('Trimmable', 'true')->Distinct())" />
     </ItemGroup>
 
     <PropertyGroup>
@@ -73,6 +74,29 @@
 
     <WriteLinesToFile File="$(SharedFxDepList)" Lines="$(SharedFxDepListContent)" Overwrite="true" />
     <Message Importance="High" Text="Generated $(SharedFxDepList)" />
+
+    <PropertyGroup>
+      <TrimmableProjectsList>$(MSBuildThisFileDirectory)TrimmableProjects.props</TrimmableProjectsList>
+      <TrimmableProjectsListContent>
+      <![CDATA[
+<!--
+  This file is automatically generated. Run `./eng/scripts/GenerateProjectList.ps1` to update.
+
+  This file contains a complete list of projects annotated for trimming.
+
+  This file is generated using the <Trimmable> properties from each .csproj in this repository.
+-->
+<Project>
+  <ItemGroup>
+    @(_TrimmableProject->'<TrimmableProject Include="%(Identity)" />', '%0A    ')
+  </ItemGroup>
+</Project>
+      ]]>
+      </TrimmableProjectsListContent>
+    </PropertyGroup>
+
+    <WriteLinesToFile File="$(TrimmableProjectsList)" Lines="$(TrimmableProjectsListContent)" Overwrite="true" />
+    <Message Importance="High" Text="Generated $(TrimmableProjectsList)" />
   </Target>
 
 </Project>
diff --git a/eng/TrimmableProjects.props b/eng/TrimmableProjects.props
new file mode 100644
index 000000000000..4600e90d4f3f
--- /dev/null
+++ b/eng/TrimmableProjects.props
@@ -0,0 +1,27 @@
+<!--
+  This file is automatically generated. Run `./eng/scripts/GenerateProjectList.ps1` to update.
+
+  This file contains a complete list of projects annotated for trimming.
+
+  This file is generated using the <Trimmable> properties from each .csproj in this repository.
+-->
+<Project>
+  <ItemGroup>
+    <TrimmableProject Include="Microsoft.Net.Http.Headers" />
+    <TrimmableProject Include="Microsoft.AspNetCore.Http.Features" />
+    <TrimmableProject Include="Microsoft.AspNetCore.Metadata" />
+    <TrimmableProject Include="Microsoft.AspNetCore.WebUtilities" />
+    <TrimmableProject Include="Microsoft.AspNetCore.Authorization" />
+    <TrimmableProject Include="Microsoft.AspNetCore.Components.Authorization" />
+    <TrimmableProject Include="Microsoft.AspNetCore.Components" />
+    <TrimmableProject Include="Microsoft.AspNetCore.Components.Forms" />
+    <TrimmableProject Include="Microsoft.Authentication.WebAssembly.Msal" />
+    <TrimmableProject Include="Microsoft.JSInterop.WebAssembly" />
+    <TrimmableProject Include="Microsoft.AspNetCore.Components.WebAssembly.Authentication" />
+    <TrimmableProject Include="Microsoft.AspNetCore.Components.WebAssembly" />
+    <TrimmableProject Include="Microsoft.AspNetCore.Components.Web" />
+    <TrimmableProject Include="Microsoft.Extensions.ObjectPool" />
+    <TrimmableProject Include="Microsoft.JSInterop" />
+    <TrimmableProject Include="Microsoft.Extensions.Features" />
+  </ItemGroup>
+</Project>
diff --git a/eng/targets/ResolveReferences.targets b/eng/targets/ResolveReferences.targets
index 077c13088e44..99835cfe6894 100644
--- a/eng/targets/ResolveReferences.targets
+++ b/eng/targets/ResolveReferences.targets
@@ -316,6 +316,7 @@
         <IsAspNetCoreApp>$([MSBuild]::ValueOrDefault($(IsAspNetCoreApp),'false'))</IsAspNetCoreApp>
         <IsPackable>$([MSBuild]::ValueOrDefault($(IsPackable),'false'))</IsPackable>
         <ProjectFileRelativePath>$([MSBuild]::MakeRelative($(RepoRoot), $(MSBuildProjectFullPath)))</ProjectFileRelativePath>
+        <Trimmable>$([MSBuild]::ValueOrDefault($(Trimmable),'false'))</Trimmable>
       </ProvidesReference>
     </ItemGroup>
   </Target>
diff --git a/src/Http/Http.Abstractions/src/Microsoft.AspNetCore.Http.Abstractions.csproj b/src/Http/Http.Abstractions/src/Microsoft.AspNetCore.Http.Abstractions.csproj
index 849312a4f462..6de147dda8ac 100644
--- a/src/Http/Http.Abstractions/src/Microsoft.AspNetCore.Http.Abstractions.csproj
+++ b/src/Http/Http.Abstractions/src/Microsoft.AspNetCore.Http.Abstractions.csproj
@@ -13,7 +13,6 @@ Microsoft.AspNetCore.Http.HttpResponse</Description>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore</PackageTags>
     <IsPackable>false</IsPackable>
-    <Trimmable>true</Trimmable>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/Tools/LinkabilityChecker/LinkabilityChecker.csproj b/src/Tools/LinkabilityChecker/LinkabilityChecker.csproj
index 01741adf0fa6..2643063b73f2 100644
--- a/src/Tools/LinkabilityChecker/LinkabilityChecker.csproj
+++ b/src/Tools/LinkabilityChecker/LinkabilityChecker.csproj
@@ -4,13 +4,14 @@
     <IsPackable>false</IsPackable>
     <OutputType>Exe</OutputType>
   </PropertyGroup>
+
+  <Import Project="$(RepoRoot)eng\TrimmableProjects.props" />
+
   <ItemGroup>
-    <Reference Include="Microsoft.Net.Http.Headers" />
-    <Reference Include="Microsoft.AspNetCore.WebUtilities" />
-    <Reference Include="Microsoft.Extensions.Features" />
-    <Reference Include="Microsoft.Extensions.ObjectPool" />
-    <Reference Include="Microsoft.AspNetCore.Http.Features" />
+    <Reference Include="@(TrimmableProject)" />
+  </ItemGroup>
 
+  <ItemGroup>
     <!-- Packages required to produce a complete dependency graph for the trimmer -->
     <Reference Include="System.Security.Permissions" />
     <Reference Include="System.Threading.AccessControl" />