protected void DropDownListFont_SelectedIndexChanged(object sender, EventArgs e) { RadioButtonList1.Font.Name = DropDownListFont.SelectedValue; RadioButtonListStyle1.Font.Name = DropDownListFont.SelectedValue; Label1.Font.Name = DropDownListFont.SelectedValue; Style style = new Style(); style.Font.Name = DropDownListFont.SelectedValue; RadioButtonList1.ApplyStyle(style); DivRadioButtonList.Style.Add("font-family", DropDownListFont.SelectedValue); }