Awsh : undo manager

awsh.cs

using System;
using System.Collections.Generic;
using System.Linq;

namespace OneFileTools {

    /// <summary>
    /// Awsh Undo helper
    /// </summary>

    public class Awsh {

        Stack<Action> undoActions = new Stack<Action>();
        bool canUndo;

        public event EventHandler CanUndoChanged;
        public event Action BeforeUndo;
        public event Action AfterUndo;

        public event Action UndoActionRegistered;

        public bool CanUndo {
            get {
                return canUndo;
            }
            set {
                if(canUndo != value) {
                    canUndo = value;
                    CanUndoChanged?.Invoke(this, EventArgs.Empty);
                }
            }
        }

        public void RegisterUndoAction(Action undoAction) {
            undoActions.Push(undoAction);
            CanUndo = undoActions.Any();
            UndoActionRegistered?.Invoke();
        }

        public bool IsUndoing {
            get;
            private set;
        }

        public void Undo() {

            IsUndoing = true;

            BeforeUndo?.Invoke();
            var action = undoActions.Pop();
            action.Invoke();
            AfterUndo?.Invoke();

            IsUndoing = false;

            CanUndo = undoActions.Any();
        }
    }
}

awshextensions.cs

using DevExpress.Xpo;
using DevExpress.XtraGrid.Views.Grid;
using DevExpress.XtraVerticalGrid;
using System;
using System.Linq;
using System.Windows.Forms;

namespace OneFileTools {
    public static class AwshExtensions {

        public static void RegisterUndo(this Binding binding, Awsh awsh) {
            binding.Parse += (s, e) => {
                if(awsh.IsUndoing)
                    return;

                var b = s as Binding;
                var obj = b.DataSource;

                var propertyInfo = obj.GetType().GetProperty(b.BindingMemberInfo.BindingField);
                var oldValue = propertyInfo.GetValue(obj);

                if(!object.Equals(oldValue, e.Value)) {
                    awsh.RegisterUndoAction(() => propertyInfo.SetValue(obj, oldValue));
                }
            };
        }
    }
}