Initial Commit

Common/Auxiliary/ObservableCollectionHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+
+namespace Microsoft.Research.DynamicDataDisplay.Common.Auxiliary
+{
+	internal static class ObservableCollectionHelper
+	{
+		public static void ApplyChanges<T>(this ObservableCollection<T> collection, NotifyCollectionChangedEventArgs args)
+		{
+			if (args.NewItems != null)
+			{
+				int startingIndex = args.NewStartingIndex;
+				var newItems = args.NewItems;
+
+				for (int i = 0; i < newItems.Count; i++)
+				{
+					T addedItem = (T)newItems[i];
+					collection.Insert(startingIndex + i, addedItem);
+				}
+			}
+			if (args.OldItems != null)
+			{
+				for (int i = 0; i < args.OldItems.Count; i++)
+				{
+					T removedItem = (T)args.OldItems[i];
+					collection.Remove(removedItem);
+				}
+			}
+		}
+	}
+}