public void BeginEdit()
        {
            backupProperties = new Dictionary<PropertyInfo, object>();
            IEnumerable<PropertyInfo> propertyInfos = this.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance)
                .Where(p => p.CanRead && p.CanWrite && p.GetSetMethod() != null);
            foreach (PropertyInfo property in propertyInfos)
                this.backupProperties[property] = property.GetValue(this, null);
        }
        public void CancelEdit()
        {
            if (backupProperties != null) {
                foreach (var pair in backupProperties)
                    pair.Key.SetValue(this, pair.Value, null);
                this.validationEnabled = validationEnabledValue;
                backupProperties.Clear();
                backupProperties = null;
            }
        }
...