Please check my code

Question

If any of row.Cells[2] or [3] is null then how can I edit this? :

 

if (_product.Where(x => x.Type.ToLower() == row.Cells[0].Value.ToString().ToLower()).Any())

{

string TotalQty = (Convert.ToInt32(_product.Where(x => x.Type.ToLower() == row.Cells[0].Value.ToString().ToLower()).Select(x => x.TotalQty).FirstOrDefault()) + Convert.ToInt32(row.Cells[3].Value.ToString())).ToString();

string TotalPrice = (Convert.ToInt32(_product.Where(x => x.Type.ToLower() == row.Cells[0].Value.ToString().ToLower()).Select(x => x.TotalPrice).FirstOrDefault()) + Convert.ToInt32(row.Cells[2].Value.ToString())).ToString();

_product.Where(x => x.Type.ToLower() == row.Cells[0].Value.ToString().ToLower()).ToList().ForEach(x => { x.TotalQty = TotalQty; x.TotalPrice = TotalPrice; });

}