diff --git a/src/System.Private.CoreLib/shared/Internal/Threading/Tasks/AsyncCausalitySupport.cs b/src/System.Private.CoreLib/shared/Internal/Threading/Tasks/AsyncCausalitySupport.cs
new file mode 100644
index 00000000000..35f4dfe18c4
--- /dev/null
+++ b/src/System.Private.CoreLib/shared/Internal/Threading/Tasks/AsyncCausalitySupport.cs
@@ -0,0 +1,57 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Threading.Tasks;
+using System.Runtime.CompilerServices;
+
+namespace Internal.Threading.Tasks
+{
+    //
+    // An internal contract that exposes just enough async debugger support needed by the AsTask() extension methods in the WindowsRuntimeSystemExtensions class.
+    //
+    public static class AsyncCausalitySupport
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void AddToActiveTasks(Task task)
+        {
+            if (Task.s_asyncDebuggingEnabled)
+                Task.AddToActiveTasks(task);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void RemoveFromActiveTasks(Task task)
+        {
+            if (Task.s_asyncDebuggingEnabled)
+                Task.RemoveFromActiveTasks(task.Id);
+        }
+
+        public static bool LoggingOn
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                return AsyncCausalityTracer.LoggingOn;
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void TraceOperationCreation(Task task, string operationName)
+        {
+            AsyncCausalityTracer.TraceOperationCreation(CausalityTraceLevel.Required, task.Id, operationName, 0);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void TraceOperationCompletedSuccess(Task task)
+        {
+            AsyncCausalityTracer.TraceOperationCompletion(CausalityTraceLevel.Required, task.Id, AsyncCausalityStatus.Completed);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void TraceOperationCompletedError(Task task)
+        {
+            AsyncCausalityTracer.TraceOperationCompletion(CausalityTraceLevel.Required, task.Id, AsyncCausalityStatus.Error);
+        }
+    }
+}
+
diff --git a/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems b/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems
index 263214af5e6..9a94bdf536b 100644
--- a/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems
+++ b/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems
@@ -22,6 +22,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Internal\IO\File.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Internal\Padding.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Internal\Runtime\CompilerServices\Unsafe.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Internal\Threading\Tasks\AsyncCausalitySupport.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Microsoft\Win32\SafeHandles\CriticalHandleMinusOneIsInvalid.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Microsoft\Win32\SafeHandles\CriticalHandleZeroOrMinusOneIsInvalid.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Microsoft\Win32\SafeHandles\SafeHandleMinusOneIsInvalid.cs" />
@@ -973,6 +974,9 @@
     <Compile Include="$(MSBuildThisFileDirectory)System\Security\SafeBSTRHandle.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Security\SecureString.Windows.cs" />
   </ItemGroup>
+  <ItemGroup Condition="'$(FeatureAsyncCausalityTracer)' != 'true'">
+    <Compile Include="$(MSBuildThisFileDirectory)System\Threading\Tasks\AsyncCausalityTracer.Noop.cs" />
+  </ItemGroup>
   <ItemGroup Condition="$(TargetsWindows) and '$(EnableWinRT)' != 'true'">
     <Compile Include="$(MSBuildThisFileDirectory)Internal\Win32\RegistryKey.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Interop\Windows\Advapi32\Interop.RegCloseKey.cs" />
diff --git a/src/System.Private.CoreLib/shared/System/Runtime/CompilerServices/AsyncMethodBuilder.cs b/src/System.Private.CoreLib/shared/System/Runtime/CompilerServices/AsyncMethodBuilder.cs
index b44df7a0cd6..f6692e8b43f 100644
--- a/src/System.Private.CoreLib/shared/System/Runtime/CompilerServices/AsyncMethodBuilder.cs
+++ b/src/System.Private.CoreLib/shared/System/Runtime/CompilerServices/AsyncMethodBuilder.cs
@@ -578,7 +578,7 @@ private void MoveNext(Thread threadPoolThread)
                 bool loggingOn = AsyncCausalitySupport.LoggingOn;
                 if (loggingOn)
                 {
-                    AsyncCausalitySupport.TraceSynchronousWorkStart(this);
+                    AsyncCausalityTracer.TraceSynchronousWorkStart(CausalityTraceLevel.Required, this.Id, CausalitySynchronousWork.Execution);
                 }
 
                 ExecutionContext context = Context;
@@ -619,7 +619,7 @@ private void MoveNext(Thread threadPoolThread)
 
                 if (loggingOn)
                 {
-                    AsyncCausalitySupport.TraceSynchronousWorkCompletion();
+                    AsyncCausalityTracer.TraceSynchronousWorkCompletion(CausalityTraceLevel.Required, CausalitySynchronousWork.Execution);
                 }
             }
 
diff --git a/src/System.Private.CoreLib/shared/System/Threading/Tasks/AsyncCausalityTracer.Noop.cs b/src/System.Private.CoreLib/shared/System/Threading/Tasks/AsyncCausalityTracer.Noop.cs
new file mode 100644
index 00000000000..c3f787b36b7
--- /dev/null
+++ b/src/System.Private.CoreLib/shared/System/Threading/Tasks/AsyncCausalityTracer.Noop.cs
@@ -0,0 +1,77 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Diagnostics;
+
+namespace System.Threading.Tasks
+{
+    internal enum CausalityTraceLevel
+    {
+        Required = 0,
+        Important = 1,
+        Verbose = 2,
+    }
+
+    internal enum AsyncCausalityStatus
+    {
+        Started = 0,
+        Completed = 1,
+        Canceled = 2,
+        Error = 3,
+    }
+
+    internal enum CausalityRelation
+    {
+        AssignDelegate = 0,
+        Join = 1,
+        Choice = 2,
+        Cancel = 3,
+        Error = 4,
+    }
+
+    internal enum CausalitySynchronousWork
+    {
+        CompletionNotification = 0,
+        ProgressNotification = 1,
+        Execution = 2,
+    }
+
+    //
+    // Empty implementation of AsyncCausality events
+    //
+    internal static class AsyncCausalityTracer
+    {
+        public static bool LoggingOn => false;
+
+        [Conditional("NOOP_ASYNCCASUALITYTRACER")]
+        public static void EnableToETW(bool enabled)
+        {
+        }
+
+        [Conditional("NOOP_ASYNCCASUALITYTRACER")]
+        public static void TraceOperationCreation(CausalityTraceLevel traceLevel, int taskId, string operationName, ulong relatedContext)
+        {
+        }
+
+        [Conditional("NOOP_ASYNCCASUALITYTRACER")]
+        public static void TraceOperationCompletion(CausalityTraceLevel traceLevel, int taskId, AsyncCausalityStatus status)
+        {
+        }
+
+        [Conditional("NOOP_ASYNCCASUALITYTRACER")]
+        public static void TraceOperationRelation(CausalityTraceLevel traceLevel, int taskId, CausalityRelation relation)
+        {
+        }
+
+        [Conditional("NOOP_ASYNCCASUALITYTRACER")]
+        public static void TraceSynchronousWorkStart(CausalityTraceLevel traceLevel, int taskId, CausalitySynchronousWork work)
+        {
+        }
+
+        [Conditional("NOOP_ASYNCCASUALITYTRACER")]
+        public static void TraceSynchronousWorkCompletion(CausalityTraceLevel traceLevel, CausalitySynchronousWork work)
+        {
+        }
+    }
+}