private void button2_Click(object sender, EventArgs e)
        {
            richTextBox1.Visible = false;
            label8.Visible       = true;
            button2.Visible      = false;
            button4.Visible      = false;
            label8.Text          = richTextBox1.Text;
            ui.Abouts            = label8.Text;

            UpdateDBLin ul = new UpdateDBLin();

            if (selectedFile != null)
            {
                ul.UpdateU(ui.UName, richTextBox1.Text, selectedFile);
                pictureBox1.Image = Image.FromFile(selectedFile);
            }
            else
            {
                ul.UpdateU(ui.UName, richTextBox1.Text);
            }
        }