/// <summary>
/// Gets the numerical character reference value.
/// </summary>
/// <param name="str">The STR.</param>
/// <returns></returns>
protected string GetNumericalCharacterReferenceValue(string str)
{
if (str != null && str.Length > 1)
{
if (str[0] == '#')
{
int val;
if (str[1] == 'x' || str[1] == 'X')
{
val = ConversionUtilities.ParseHex(str.Substring(2));
}
else
{
val = ConversionUtilities.ParseInt(str.Substring(1));
}
if (val > 0)
{
return(((char)val).ToString());
}
}
}
return(null);
}
