private void Accept_Clicked(object sender, EventArgs e) { try { double.TryParse(AIJ.Text, out a[i][j]); j++; if (j == mass) { j = 0; i++; if (i == mass) { AIJ.IsVisible = false; Accept.IsVisible = false; Det Determinant = new Det(); result.Text = "Определитель =" + Determinant.GetDet(a, b, mass).ToString(); result.IsVisible = true; } } AIJ.Text = null; AIJ.Placeholder = "A" + $"{i}" + $"{j}"; } catch (Exception ex) { Except(); } }