1 files changed, 39 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/Diagnostics/Tracing/EventActivityOptions.cs b/src/mscorlib/shared/System/Diagnostics/Tracing/EventActivityOptions.cs
new file mode 100644
index 0000000000..782afbf869
--- /dev/null
+++ b/src/mscorlib/shared/System/Diagnostics/Tracing/EventActivityOptions.cs
@@ -0,0 +1,39 @@
+// 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;
+
+#if ES_BUILD_STANDALONE
+namespace Microsoft.Diagnostics.Tracing
+#else
+namespace System.Diagnostics.Tracing
+#endif
+{
+    /// <summary>
+    /// EventActivityOptions flags allow to specify different activity related characteristics.
+    /// </summary>
+    [Flags]
+    public enum EventActivityOptions
+    {
+        /// <summary>
+        /// No special options are added to the event.
+        /// </summary>
+        None = 0,
+
+        /// <summary>
+        /// Disable Implicit Activity Tracking
+        /// </summary>
+        Disable = 0x2,
+
+        /// <summary>
+        /// Allow activity event to call itself (directly or indirectly)
+        /// </summary>
+        Recursive = 0x4,
+
+        /// <summary>
+        /// Allows event activity to live beyond its parent.
+        /// </summary>
+        Detachable = 0x8
+    }
+}