From a04bddb586fc4415e53739384582bf7c2ae380c0 Mon Sep 17 00:00:00 2001
From: "Kasper F. Brandt" <poizan@poizan.dk>
Date: Wed, 4 Apr 2018 22:22:56 +0200
Subject: [PATCH] TotalItemsInView in ResolutionSet is not reliable, workaround
 for #177.

---
 Misc/NameResolution.cs           | 11 +++++++++--
 Misc/NameResolutionCollection.cs | 12 +++++++-----
 2 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/Misc/NameResolution.cs b/Misc/NameResolution.cs
index 2f9de1e9..7010de63 100644
--- a/Misc/NameResolution.cs
+++ b/Misc/NameResolution.cs
@@ -56,9 +56,15 @@ internal NameResolution(NameResolutionCollection owner)
         /// Loads from XML.
         /// </summary>
         /// <param name="reader">The reader.</param>
-        internal void LoadFromXml(EwsServiceXmlReader reader)
+        /// <param name="allowNoMoreElements">If true the function returns false rather than throw an exception
+        /// if the last element has been read.</param>
+        internal bool LoadFromXml(EwsServiceXmlReader reader, bool allowNoMoreElements)
         {
-            reader.ReadStartElement(XmlNamespace.Types, XmlElementNames.Resolution);
+            reader.Read();
+            if (allowNoMoreElements && reader.NodeType == System.Xml.XmlNodeType.EndElement)
+                return false;
+
+            reader.EnsureCurrentNodeIsStartElement(XmlNamespace.Types, XmlElementNames.Resolution);
 
             reader.ReadStartElement(XmlNamespace.Types, XmlElementNames.Mailbox);
             this.mailbox.LoadFromXml(reader, XmlElementNames.Mailbox);
@@ -81,6 +87,7 @@ internal void LoadFromXml(EwsServiceXmlReader reader)
             {
                 reader.EnsureCurrentNodeIsEndElement(XmlNamespace.Types, XmlElementNames.Resolution);
             }
+            return true;
         }
 
         /// <summary>
diff --git a/Misc/NameResolutionCollection.cs b/Misc/NameResolutionCollection.cs
index 7fdc1f08..bd43225c 100644
--- a/Misc/NameResolutionCollection.cs
+++ b/Misc/NameResolutionCollection.cs
@@ -60,19 +60,21 @@ internal void LoadFromXml(EwsServiceXmlReader reader)
         {
             reader.ReadStartElement(XmlNamespace.Messages, XmlElementNames.ResolutionSet);
 
-            int totalItemsInView = reader.ReadAttributeValue<int>(XmlAttributeNames.TotalItemsInView);
+            // Note: TotalItemsInView is not reliable, https://github.com/OfficeDev/ews-managed-api/issues/177
             this.includesAllResolutions = reader.ReadAttributeValue<bool>(XmlAttributeNames.IncludesLastItemInRange);
 
-            for (int i = 0; i < totalItemsInView; i++)
+            NameResolution nameResolution;
+            while (true)
             {
-                NameResolution nameResolution = new NameResolution(this);
+                nameResolution = new NameResolution(this);
 
-                nameResolution.LoadFromXml(reader);
+                if (!nameResolution.LoadFromXml(reader, true))
+                    break;
 
                 this.items.Add(nameResolution);
             }
 
-            reader.ReadEndElement(XmlNamespace.Messages, XmlElementNames.ResolutionSet);
+            reader.EnsureCurrentNodeIsEndElement(XmlNamespace.Messages, XmlElementNames.ResolutionSet);
         }
 
         /// <summary>