Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Workflow.Runtime/Tracking/TrackingConditionCollection.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Text;
+using System.Xml;
+using System.Xml.Schema;
+using System.IO;
+using System.Reflection;
+using System.Diagnostics;
+using System.Runtime.Serialization;
+using System.Security.Permissions;
+using System.Globalization;
+
+//using System.Workflow.Activities;
+using System.Workflow.ComponentModel;
+using System.Workflow.Runtime;
+using System.Workflow.Runtime.Hosting;
+using Hosting = System.Workflow.Runtime.Hosting;
+
+
+namespace System.Workflow.Runtime.Tracking
+{
+    [Serializable]
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public class TrackingConditionCollection : List<TrackingCondition>
+    {
+        public TrackingConditionCollection()
+        {
+        }
+
+        public TrackingConditionCollection(IEnumerable<TrackingCondition> conditions)
+        {
+            //
+            // Not using the IEnumerable<T> constructor on the base List<T> so that we can check for null.
+            // The code behind AddRange doesn't appear to have a significant perf 
+            // overhead compared to the IEnumerable<T> constructor if the list is empty
+            // (which it will always be at this point).
+            if (null == conditions)
+                throw new ArgumentNullException("conditions");
+
+            AddRange(conditions);
+        }
+    }
+}