private void CheckChanges(DataGridView view0, DataGridView view1)
        {
            if (view0.RowCount < 1 || view1.RowCount < 1)
                throw new Exception("Файлы должны быть не пусты");

            var max = view0.RowCount > view1.RowCount ? view0.RowCount : view1.RowCount;

            for (int i = 0; i < max; i++)
                CompareCells(view0.Rows[i], view1.Rows[i]);
        }

        private void CompareCells(DataGridViewRow row0, DataGridViewRow row1)
        {
            if (row0.Cells.Count < 1 || row1.Cells.Count < 1)
                throw new Exception("Файлы должны быть не пусты");

            var max = row0.Cells.Count > row1.Cells.Count ? row0.Cells.Count : row1.Cells.Count;

            for (int i =0;i<max; i++)
            {
                var cell0 = row0.Cells[i];
                var cell1 = row1.Cells[i];

                cell1.Style.BackColor = (string)cell0.Value != (string)cell1.Value ? Color.Red : Color.White;
            }
        }