ASP.Net RadioButton visibility inside a RadioButtonList

RadioButtonList.Items(1).CssStyle.Add("visibility", "hidden")

RadioButtonList.Items.Add("Item Name" or index);
RadioButtonList.Items.Remove("Item Name" or index);

foreach(ListItem myItem in rbl.Items)
{
if(whatever condition)
myItem.Attributes.Add("visibility","hidden");

}

RadioButtonList.Items.Remove(RadioButtonList.Items.FindByValue("3"));