internal static bool IsLowSurrogate(int ch) { return(XmlCharType.InRange(ch, 56320, 57343)); }
internal static bool IsSurrogate(int ch) { return(XmlCharType.InRange(ch, 55296, 57343)); }
internal static bool IsHighSurrogate(int ch) { return(XmlCharType.InRange(ch, 55296, 56319)); }