how to convert a illegible string to legible string?

Question

hi i want to convert a illegible string to legible.i try this code: string encoded_text = richTextBox1.Text; string decoded_text; byte[] b = System.Text.Encoding.Default.GetBytes(encoded_text); decoded_text = System.Text.Encoding.UTF8.GetString(b); richTextBox2.Text = decoded_text; but when i convert encoded_text just show ? in richtextbox2. can you help me? you can download my project by this link: download my project thanks

Ranjit Powar · Answer

Try this private void button1_Click(object sender EventArgs e) { string encoded_text = richTextBox1.Text; string decoded_text=; byte[] b = System.Text.Encoding.UTF8 .GetBytes(encoded_text); foreach (byte element in b ) { decoded_text += element; } richTextBox2.Text =decoded_text ; }