It will throw System.ArgumentOutOfRangeException when do add member in page2 of MDS2012.

Prerequisite:Make Entity has more than 2 pages.

Repro1:

1.Go to MDS explorer and choose entity.

2.Go to Page 2.

3. Click Add member button.

Repro2:

1. Go to MDS explorer and choose entity.

2. Click Add member button.

3. Go to Page 2.

Actual Result:

System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
   at System.ThrowHelper.ThrowArgumentOutOfRangeException()
   at System.Collections.Generic.List`1.get_Item(Int32 index)
   at System.Collections.ObjectModel.Collection`1.get_Item(Int32 index)
   at Microsoft.MasterDataServices.Client.ViewModel.Common.SortablePagedCollectionView`1.GetEnumerator()
   at System.Windows.Controls.DataForm.get_ItemsCount()
   at System.Windows.Controls.DataForm.SetCanMoveToLastItem()
   at System.Windows.Controls.DataForm.SetAllCanProperties()
   at System.Windows.Controls.DataForm.<SetUpCollectionView>b__a(DataForm instance, Object source, NotifyCollectionChangedEventArgs eventArgs)
   at System.Windows.Controls.WeakEventListener`3.OnEvent(TSource source, TEventArgs eventArgs)
   at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   at Microsoft.MasterDataServices.Client.ViewModel.Common.SortablePagedCollectionView`1.CollectionChangedHandler(Object sender, NotifyCollectionChangedEventArgs e)
   at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   at System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item)
   at System.Collections.ObjectModel.Collection`1.Insert(Int32 index, T item)
   at Microsoft.MasterDataServices.Client.ViewModel.MasterData.EntityMembersViewModel.AddNewMemberToCollection(Guid requestId, EntityMembersGetResponse response, Exception ex)
   at Microsoft.MasterDataServices.Client.ViewModel.ServiceProxy.ServiceClient.<>c__DisplayClass16`2.<ExecuteRequest>b__15(Object sender, RequestCompletedEventArgs`1 e)
   at System.EventHandler`1.Invoke(Object sender, TEventArgs e)
   at Microsoft.MasterDataServices.Client.ViewModel.ServiceProxy.ServiceClient.OnEntityMembersGetCompleted(Object state)