private void btncoltext_Click(object sender, EventArgs e)
        {
            if (rdoRed.Checked == true)
            {
                label1.ForeColor = Color.Red;
            }
            if (rdoBlue.Checked == true)
            {
                label1.ForeColor = Color.Blue;
            }
            if (rdoGreen.Checked == true)
            {
                label1.ForeColor = Color.Green;
            }
        }

private void radioButton1_CheckedChanged(object sender, EventArgs e)
        {
            if (radioButton1.Checked == true)
            {
                label1.BackColor = Color.Red;
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            if (radioButton2.Checked == true)
            {
                label1.BackColor = Color.Blue;
            }
        }