Emojify

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Emojify
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Input_TextChanged(object sender, TextChangedEventArgs e)
        {
            try
            {
                bool looping = true;

                string outputText = " ";
                if (Input.Text == "") { goto End; }
                String inputString = Input.Text;
                char[] inputArray = inputString.ToCharArray();
                int i = inputArray.Length;
                while (looping)
                {
                    loop:
                    i--;
                    if (i <= 0) { looping = false; }
                    inputArray[i] = char.ToLower(inputArray[i]);
                    string currentChar = Convert.ToString(inputArray[i]);
                    if (currentChar == " ") { outputText = "   " + outputText; goto loop; }
                    if ((inputArray[i] >= 'a' && inputArray[i] <= 'z') || (inputArray[i] >= 'A' && inputArray[i] <= 'Z'))
                    {
                        outputText = ":regional_indicator_" + inputArray[i] + ": " + outputText;
                    } else
                    {
                        outputText = inputArray[i] + " " + outputText;
                    }
                }
                End:
                Output.Text = outputText;
            } catch { /* Don't care */ }
        }
    }
}