private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            string inputstr = new string (textBox1.Text.ToCharArray());
            string outputstr = null;
            char ch1;
            for (int i = 0; i <= inputstr.Length - 1; i++)
            {
                ch1 = inputstr[i];
                if (ch1 == 'a' || ch1 == 'A' || ch1 == 'o' || ch1 == 'O' || ch1 == 'u' || ch1 == 'U' ||                      ch1 == 'e' || ch1 == 'E')
                {
                    outputstr += "egg";
                    outputstr += ch1.ToString();

                }
                else
                {
                    outputstr = ch1.ToString();
                }


                    textBox2.Text = outputstr;
               
            }
            }

        private void button2_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
            textBox2.Text = "";
        }
            }
    }