Convert2HTML Notepad++ Plugin Code

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace NppPluginNET
{
    public partial class CSV2HTMLTable : Form
    {
        public CSV2HTMLTable()
        {
            InitializeComponent();
            DialogResult = DialogResult.Cancel;
            cbxSeparator.Items.Add(new Separator {Name = "Tab", Value = "\t"});
            cbxSeparator.Items.Add(new Separator { Name = "Comma \",\"", Value = "," });
            cbxSeparator.Items.Add(new Separator { Name = "Pipe \"|\"", Value = "|" });
            cbxSeparator.Items.Add(new Separator { Name = "Space \" \"", Value = " " });
            cbxSeparator.SelectedIndex = Convert2HTMLSettings.Default.Separator;
            txtClass.Visible = cbxTableClass.Checked = (!string.IsNullOrEmpty(Convert2HTMLSettings.Default.TableClass));
            txtClass.Text = Convert2HTMLSettings.Default.TableClass;
            cbxUseTH.Checked = Convert2HTMLSettings.Default.UseTH;
        }

        private void BtnOkClick(object sender, EventArgs e)
        {
            DialogResult = DialogResult.OK;
            Convert2HTMLSettings.Default.Separator = cbxSeparator.SelectedIndex;
            Convert2HTMLSettings.Default.TableClass = txtClass.Text;
            Convert2HTMLSettings.Default.UseTH = cbxUseTH.Checked;
            Convert2HTMLSettings.Default.Save();
            Close();
        }

        private void BtnCancelClick(object sender, EventArgs e)
        {
            Close();
        }

        private void CbxTableClassCheckedChanged(object sender, EventArgs e)
        {
            txtClass.Visible = cbxTableClass.Checked;
            if (!cbxTableClass.Checked)
            {
                txtClass.Text = string.Empty;
            }
        }

        public string ConverToHTML(string s)
        {
            var reader = new StringReader(s);            
            var sb = new StringBuilder();
            string line = string.Empty;
            if (!string.IsNullOrEmpty(s))
            {
                line = reader.ReadLine();
                while (string.IsNullOrEmpty(line))
                {
                    line = reader.ReadLine();
                }
                sb.AppendFormat("<table{0}>\n",cbxTableClass.Checked?string.Format(" class=\"{0}\"",txtClass.Text):string.Empty);
                sb.Append(" <tr>");
                if (cbxUseTH.Checked)
                {
                    sb.AppendFormat("<th>{0}</th>",line.Replace((cbxSeparator.SelectedItem as Separator).Value,"</th><th>"));
                }
                else
                {
                    sb.AppendFormat("<td>{0}</td>", line.Replace((cbxSeparator.SelectedItem as Separator).Value, "</td><td>"));
                }
                sb.Append("</tr>\n");
            }
            line = reader.ReadLine();         
            while (!string.IsNullOrEmpty(line))
            {
                sb.Append(" <tr>");
                sb.AppendFormat("<td>{0}</td>", line.Replace((cbxSeparator.SelectedItem as Separator).Value, "</td><td>"));
                sb.Append("</tr>\n");
                line = reader.ReadLine();
            }
            if (!string.IsNullOrEmpty(s))
            {                
                sb.Append("</table>");
            }
            return sb.ToString();
        }        
    }
}