System.Xml.XmlWellFormedWriter.WriteCharEntity C# (CSharp) Method

        public override void WriteCharEntity(char ch)
        {
            try
            {
                if (Char.IsSurrogate(ch))
                {
                    throw new ArgumentException(SR.Xml_InvalidSurrogateMissingLowChar);
                }

                AdvanceState(Token.Text);
                if (SaveAttrValue)
                {
                    _attrValueCache.WriteCharEntity(ch);
                }
                else
                {
                    _writer.WriteCharEntity(ch);
                }
            }
            catch
            {
                _currentState = State.Error;
                throw;
            }
        }