Sharplike.Editlike.MapTools.SquareChange.PenChange_OnUndo C# (CSharp) Method

        void PenChange_OnUndo(object sender, EventArgs e)
        {
            foreach (KeyValuePair<Vector3, SquareChanged> kvp in this.changes)
            {
                map.SetSquare(kvp.Key, kvp.Value.oldSquare);
            }
            map.ViewFrom(map.View, true);
        }