Working on an English to Pig Latin translator. When I click Translate I am getting:

System.Windows.Forms.TextBox.Text: System.Windows.Forms.TextBox.Text:Syst..using System;

Here's the code I have so far, any help narrowing this down would be greatly appreciated.

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

namespace CSA_164_Midterm
{
    public partial class frmTranslator : Form
    {
        public frmTranslator()
        {
            InitializeComponent();
        }

        private void btnTranslation_Click(object sender, EventArgs e)
        {
            string english = Convert.ToString(txtInput.Text);
            string pigLatin = "";
            string firstLetter;
            string restOfWord;
            string vowels = "AEIOUaeiou";
            int letterPos;

            foreach (string word in english.Split())
            {
                firstLetter = word.Substring(0,1);
                restOfWord = word.Substring(1,word.Length - 1);
                letterPos = vowels.IndexOf(firstLetter);
                if (letterPos == -1)
                {
                    pigLatin = restOfWord + firstLetter + "ay";
                }
                else
                {
                    pigLatin = word + "way";
                }
                txtTranslation.Text = txtTranslation.ToString();
                txtInput.Focus();
            }
            
        }

        private void btnClear_Click(object sender, EventArgs e)
        {
            txtInput.Text = "";
            txtTranslation.Text = "";
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}