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diff --git a/source/ShiftUI/Internal/BindingManagerBase.cs b/source/ShiftUI/Internal/BindingManagerBase.cs
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+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+// Copyright (c) 2004-2005 Novell, Inc.
+//
+// Authors:
+//	Peter Bartok	[email protected]
+//	Jackson Harper	[email protected]
+//
+
+
+// NOT COMPLETE
+
+using System.ComponentModel;
+using System.Collections;
+using System;
+
+namespace ShiftUI
+{
+	public abstract class BindingManagerBase
+	{
+		private BindingsCollection	bindings;
+		internal bool transfering_data; /* true if we're pushing or pulling data */
+
+		#region Public Constructors
+		public BindingManagerBase()
+		{
+		}
+		#endregion	// Public Constructors
+
+		#region Protected Instance Fields
+		protected EventHandler onCurrentChangedHandler;
+		protected EventHandler onPositionChangedHandler;
+		internal EventHandler onCurrentItemChangedHandler;
+		#endregion	// Protected Instance Fields
+
+		#region Public Instance Properties
+		public BindingsCollection Bindings {
+			get {
+				if (bindings == null) {
+					bindings = new BindingsCollection ();
+				}
+				return bindings;
+			}
+		}
+
+		public abstract int Count {
+			get;
+		}
+
+		public abstract object Current {
+			get;
+		}
+
+		public bool IsBindingSuspended {
+			get {
+				return IsSuspended;
+			}
+		}
+
+		public abstract int Position {
+			get; set;
+		}
+		#endregion	// Public Instance Properties
+
+		#region Public Instance Methods
+		public abstract void AddNew();
+
+		public abstract void CancelCurrentEdit();
+
+		public abstract void EndCurrentEdit();
+
+		public virtual PropertyDescriptorCollection GetItemProperties()
+		{
+			return GetItemPropertiesInternal ();
+		}
+		
+		internal virtual PropertyDescriptorCollection GetItemPropertiesInternal ()
+		{
+			throw new NotImplementedException ();
+		}
+
+		public abstract void RemoveAt(int index);
+
+		public abstract void ResumeBinding();
+
+		public abstract void SuspendBinding();
+		#endregion	// Public Instance Methods
+
+		internal virtual bool IsSuspended {
+			get {
+				return false;
+			}
+		}
+
+		#region Protected Instance Methods
+		[MonoTODO ("Not implemented, will throw NotImplementedException")]
+		protected internal virtual PropertyDescriptorCollection GetItemProperties (ArrayList dataSources, ArrayList listAccessors)
+		{
+			throw new NotImplementedException();
+		}
+
+		[MonoTODO ("Not implemented, will throw NotImplementedException")]
+		protected virtual PropertyDescriptorCollection GetItemProperties (Type listType, int offset, ArrayList dataSources, ArrayList listAccessors)
+		{
+			throw new NotImplementedException();
+		}
+
+		protected internal abstract string GetListName (ArrayList listAccessors);
+
+		protected internal abstract void OnCurrentChanged (EventArgs e);
+
+		protected void PullData()
+		{
+			try {
+				if (!transfering_data) {
+					transfering_data = true;
+					UpdateIsBinding ();
+				}
+				foreach (Binding binding in Bindings) {
+					binding.PullData ();
+				}
+			} finally {
+				transfering_data = false;
+			}
+		}
+
+		protected void PushData()
+		{
+			try {
+				if (!transfering_data) {
+					transfering_data = true;
+					UpdateIsBinding ();
+				}
+				foreach (Binding binding in Bindings) {
+					binding.PushData ();
+				}
+			} finally {
+				transfering_data = false;
+			}
+		}
+
+
+		protected void OnBindingComplete (BindingCompleteEventArgs args)
+		{
+			if (BindingComplete != null)
+				BindingComplete (this, args);
+		}
+
+		protected abstract void OnCurrentItemChanged (EventArgs e);
+
+		protected void OnDataError (Exception e)
+		{
+			if (DataError != null)
+				DataError (this, new BindingManagerDataErrorEventArgs (e));
+		}
+
+		protected abstract void UpdateIsBinding();
+		#endregion	// Protected Instance Methods
+
+		internal void AddBinding (Binding binding)
+		{
+			if (Bindings.Contains (binding))
+				return;
+			Bindings.Add (binding);
+		}
+
+		#region Events
+		public event EventHandler CurrentChanged {
+			add { onCurrentChangedHandler += value; }
+			remove { onCurrentChangedHandler -= value; }
+		}
+
+		public event EventHandler PositionChanged {
+			add { onPositionChangedHandler += value; }
+			remove { onPositionChangedHandler -= value; }
+		}
+
+		public event EventHandler CurrentItemChanged {
+			add { onCurrentItemChangedHandler += value; }
+			remove { onCurrentItemChangedHandler -= value; }
+		}
+
+		public event BindingCompleteEventHandler BindingComplete;
+		public event BindingManagerDataErrorEventHandler DataError;
+		#endregion	// Events
+	}
+}