Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Activities/System/Activities/Tracking/TrackingQuery.cs

@@ -0,0 +1,37 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+namespace System.Activities.Tracking
+{
+    using System.Collections.Generic;
+
+    public abstract class TrackingQuery
+    {
+        IDictionary<string, string> queryAnnotations;
+
+        protected TrackingQuery()
+        {
+        }
+
+        public IDictionary<string, string> QueryAnnotations
+        {
+            get
+            {
+                if (this.queryAnnotations == null)
+                {
+                    this.queryAnnotations = new Dictionary<string, string>();
+                }
+                return this.queryAnnotations;
+            }
+        }
+
+        internal bool HasAnnotations
+        {
+            get
+            {
+                return this.queryAnnotations != null && this.queryAnnotations.Count > 0;
+            }
+        }
+    }
+}