public override ErrorList Validate()
{
var result = new ErrorList();
result.AddRange(base.Validate());
if (PropertyElement != null)
{
result.AddRange(PropertyElement.Validate());
}
if (OpElement != null)
{
result.AddRange(OpElement.Validate());
}
if (ValueElement != null)
{
result.AddRange(ValueElement.Validate());
}
return(result);
}