public static bool IsNameStartChar(char c, char d)
{
if (CharHelper.IsHighSurrogate(c) && CharHelper.IsLowSurrogate(d))
{
int codepoint = CharHelper.ConvertToUtf32(c, d);
return(codepoint >= 0x10000 && codepoint <= 0xeffff);
}
else
{
return(false);
}
}