Win.CodeNavi.frmMain.cmdRemember_Click C# (CSharp) Method

        private void cmdRemember_Click(object sender, EventArgs e)
        {
            string[] strExts = txtExt.Text.Split(';'); // is the defined extensions list the correct format?
            foreach (string strExt in strExts)
            {
                if (strExt.StartsWith("*.") == false)
                {
                    MessageBox.Show(txtExt.Text + " is not in the correct format\nPlease use *.ext1;*.ext2\n", "Incorrect format", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }
            }

            txtExt.Items.Insert(0, txtExt.Text);

            Properties.Settings.Default.Extensions = txtExt.Text;
            Properties.Settings.Default.Save();

            SaveExtensions();
        }