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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
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+++ b/src/System.Private.CoreLib/shared/System/Threading/Tasks/AsyncCausalityTracer.Noop.cs
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+// 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)
+ {
+ }
+ }
+}