1.19 C# String

private void button1_Click(object sender, EventArgs e)
        {
            string strText = label1.Text;

            DContain.Text = strText.Contains("Test").ToString();
            DEquals.Text = strText.Equals("Test").ToString();
            DLength.Text = strText.Length.ToString();
            DReplace.Text = strText.Replace("Test", "draon").ToString();

            string[] strSplit = strText.Split('_');
            DSplit.Text = strSplit[0].ToString();

            DSubstring.Text = strText.Substring(3, 5).ToString();

            DToLower.Text = strText.ToLower().ToString();
            DToUpper.Text = strText.ToUpper().ToString();

            DTrim.Text = strText.Trim().ToString();
        }