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;
using ColorCode;
using ColorCode.Formatting;

namespace NppPluginNET
{
    public partial class Code2HTML : Form
    {
        Dictionary<string,Type> lang = new Dictionary<string, Type>();
        
        public Code2HTML()
        {
            InitializeComponent();
            lang["C#"] = typeof (CSharpExt);
            lang["T-SQL"] = typeof(ColorCode.Compilation.Languages.Sql);
            lang["Xml"] = typeof(ColorCode.Compilation.Languages.Xml);
            lang["JavaScript"] = typeof(ColorCode.Compilation.Languages.AspxCs);
            lang["Aspx C#"] = typeof(ColorCode.Compilation.Languages.JavaScript);
            lang["HTML"] = typeof(ColorCode.Compilation.Languages.Html);
            var top = 25;
            foreach (var l in lang.Keys)
            {
                var rbtn = new RadioButton
                               {
                                   Text = l, 
                                   Top = top, 
                                   Left = 15                                   
                               };
                if (l == Convert2HTMLSettings.Default.Lang)
                {
                    rbtn.Checked = true;
                    lbClasses.Visible = txtClasses.Visible = (l == "C#");                    
                }
                rbtn.CheckedChanged += CheckedChanged;
                top += 22;
                panLanguages.Controls.Add(rbtn);                    
            }
            txtClasses.Text = Convert2HTMLSettings.Default.ClassNames;
            rbtnExternal.Checked = Convert2HTMLSettings.Default.ExternalCSS;
            rbtnInline.Checked = !Convert2HTMLSettings.Default.ExternalCSS;
            DialogResult = DialogResult.Cancel;
        }

        public string ConvertCode(string code)
        {
            var styler = new CodeColorizer();
            var sb = new StringBuilder();
            ILanguage language = null;
            if (Convert2HTMLSettings.Default.LangType == typeof(CSharpExt).ToString())
            {                
                language = new CSharpExt(Convert2HTMLSettings.Default.ClassNames);
            }
            else
            {
                Type langType = Type.GetType(string.Concat(Convert2HTMLSettings.Default.LangType,", ColorCode"));
                if (langType != null)
                {
                    language = Activator.CreateInstance(langType) as ILanguage;   
                }                    
            }
            if (language != null)
            {
                IFormatter formatter;
                if (Convert2HTMLSettings.Default.ExternalCSS)
                {
                    formatter = new HtmlClassFormatter();
                }
                else
                {
                    formatter = new HtmlFormatter();
                }
                styler.Colorize(code, language, formatter, StyleSheets.Default, new StringWriter(sb));
                return sb.ToString();
            }
            return string.Empty;
        }

        void CheckedChanged(object sender, EventArgs e)
        {
            for (int i = 0; i < panLanguages.Controls.Count; i++)
            {
                var rbtn = panLanguages.Controls[i] as RadioButton;
                if (rbtn !=null && rbtn.Checked)
                {
                    Convert2HTMLSettings.Default.Lang = lang.Keys.ToArray()[i];
                    Convert2HTMLSettings.Default.LangType = lang[Convert2HTMLSettings.Default.Lang].ToString();
                    lbClasses.Visible = txtClasses.Visible = (Convert2HTMLSettings.Default.Lang == "C#");
                }
            }
        }

        private void BtnOkClick(object sender, EventArgs e)
        {
            if (panOptions.Visible && string.Compare(Convert2HTMLSettings.Default.ClassNames,txtClasses.Text) !=0)
            {
                Convert2HTMLSettings.Default.ClassNames = txtClasses.Text;
                MessageBox.Show("Restart Notepad++ in order to apply custom classes change.","Information",MessageBoxButtons.OK,MessageBoxIcon.Information);
            }
            Convert2HTMLSettings.Default.ExternalCSS = rbtnExternal.Checked;
            Convert2HTMLSettings.Default.Save();
            DialogResult = DialogResult.OK;            
            Close();
        }

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