protected void Button1_Click(object sender, EventArgs e)
        {
            var a = new ValueCalculator();

            a.createLists(DDL1, DDL2, DDL3, DDL4);
            Label1.Text = a.CalculateOhmValue(DDL1, DDL2, DDL3, DDL4);
            a.clearList();
        }
        protected void Page_Load(object sender, EventArgs e)
        {
            ValueCalculator a = new ValueCalculator();

            a.createLists(DDL1, DDL2, DDL3, DDL4);
        }