initial commit of tracing context files
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index fba5a02..d52022d 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -478,6 +478,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\census\resource.c">
       <Filter>src\core\ext\census</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\census\trace_context.c">
+      <Filter>src\core\ext\census</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\census\tracing.c">
       <Filter>src\core\ext\census</Filter>
     </ClCompile>
@@ -980,6 +983,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\census\rpc_metric_id.h">
       <Filter>src\core\ext\census</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\census\trace_context.h">
+      <Filter>src\core\ext\census</Filter>
+    </ClInclude>
   </ItemGroup>
 
   <ItemGroup>