Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/SMDiagnostics/System/ServiceModel/Diagnostics/DiagnosticTraceSource.cs

@@ -0,0 +1,55 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+namespace System.ServiceModel.Diagnostics
+{
+    using System.Diagnostics;
+
+    class DiagnosticTraceSource : PiiTraceSource
+    {
+        const string PropagateActivityValue = "propagateActivity";
+        internal DiagnosticTraceSource(string name, string eventSourceName)
+            : base(name, eventSourceName)
+        {
+        }
+
+        internal DiagnosticTraceSource(string name, string eventSourceName, SourceLevels level)
+            : base(name, eventSourceName, level)
+        {
+        }
+
+        protected override string[] GetSupportedAttributes()
+        {
+            string[] baseAttributes = base.GetSupportedAttributes();
+            string[] supportedAttributes = new string[baseAttributes.Length + 1];
+            for (int i = 0; i < baseAttributes.Length; i++)
+            {
+                supportedAttributes[i] = baseAttributes[i];
+            }
+            supportedAttributes[baseAttributes.Length] = DiagnosticTraceSource.PropagateActivityValue;
+
+            return supportedAttributes;
+        }
+
+        internal bool PropagateActivity
+        {
+            get
+            {
+                bool retval = false;
+                string attributeValue = this.Attributes[DiagnosticTraceSource.PropagateActivityValue];
+                if (!string.IsNullOrEmpty(attributeValue))
+                {
+                    if (!bool.TryParse(attributeValue, out retval))
+                    {
+                        retval = false;
+                    }
+                }
+                return retval;
+            }
+            set
+            {
+                this.Attributes[DiagnosticTraceSource.PropagateActivityValue] = value.ToString();
+            }
+        }
+    }
+}