ASCIIArt.MainForm.buttonGenerate_Click C# (CSharp) Метод

        private void buttonGenerate_Click(object sender, EventArgs e)
        {
            if (pictureBoxImage.Image == null)
            {
                MessageBox.Show("Please select an image.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }

            int columns;
            if (string.IsNullOrEmpty(textBoxColumns.Text))
            {
                columns = pictureBoxImage.Image.Width;
                textBoxColumns.Text = columns.ToString();
            }
            else
            {
                if (!int.TryParse(textBoxColumns.Text, out columns))
                {
                    MessageBox.Show("Illegal integer format: \"Columns\".", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }
            }

            int lines;
            if (string.IsNullOrEmpty(textBoxLines.Text))
            {
                lines = pictureBoxImage.Image.Height;
                textBoxLines.Text = lines.ToString();
            }
            else
            {
                if (!int.TryParse(textBoxLines.Text, out lines))
                {
                    MessageBox.Show("Illegal integer format: \"Lines\".", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }
            }

            float font_size;
            if (string.IsNullOrEmpty(textBoxFontSize.Text))
            {
                font_size = 9.0f;
                textBoxFontSize.Text = font_size.ToString();
            }
            else
            {
                if (!float.TryParse(textBoxFontSize.Text, out font_size))
                {
                    MessageBox.Show("Illegal float format: \"Font Size\".", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }
            }

            result_form.ResultFont = new Font(comboBoxFontFamily.Text, font_size);
            using (Graphics graphics = this.CreateGraphics())
            {
                result_form.ResultText = ASCIIArt.Generate(graphics, new Bitmap(pictureBoxImage.Image, columns, lines), result_form.ResultFont, new HashSet<char>(ascii));
            }
            result_form.ShowDialog();
        }