Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Workflow.ComponentModel/AuthoringOM/Serializer/QueueSurrogate.cs

@@ -0,0 +1,71 @@
+namespace System.Workflow.ComponentModel.Serialization
+{
+    using System;
+    using System.Xml;
+    using System.Runtime.Serialization;
+    using System.Reflection;
+    using System.IO;
+    using System.Runtime.Serialization.Formatters.Binary;
+    using System.Collections;
+    using System.Collections.Generic;
+
+    #region QueueSurrogate
+    internal sealed class QueueSurrogate : ISerializationSurrogate
+    {
+        internal QueueSurrogate() { }
+        void ISerializationSurrogate.GetObjectData(object obj, SerializationInfo info, StreamingContext context)
+        {
+            object[] items = ((Queue)obj).ToArray();
+            if (items.Length == 1)
+                info.AddValue("item", items[0]);
+            else
+                info.AddValue("items", items);
+            info.SetType(typeof(QRef));
+        }
+
+        object ISerializationSurrogate.SetObjectData(object obj, SerializationInfo info, StreamingContext context, ISurrogateSelector selector)
+        {
+            return null;
+        }
+
+        #region QRef
+        [Serializable]
+        private sealed class QRef : IObjectReference, IDeserializationCallback
+        {
+            [OptionalField]
+            private IList items = null;
+            [OptionalField]
+            private object item = null;
+
+            [NonSerialized]
+            private Queue queue = null;
+
+            Object IObjectReference.GetRealObject(StreamingContext context)
+            {
+                if (this.queue == null)
+                {
+                    this.queue = new Queue();
+                }
+                return this.queue;
+            }
+            void IDeserializationCallback.OnDeserialization(Object sender)
+            {
+                if (this.queue != null)
+                {
+                    if (this.items != null)
+                    {
+                        for (int n = 0; n < this.items.Count; n++)
+                            this.queue.Enqueue(items[n]);
+                    }
+                    else
+                    {
+                        this.queue.Enqueue(this.item);
+                    }
+                    this.queue = null;
+                }
+            }
+        }
+        #endregion
+    }
+    #endregion
+}