System.Xml.XmlValidatingReaderImpl.ReadAsync C# (CSharp) Method

        public override async Task<bool> ReadAsync()
        {
            switch (_parsingFunction)
            {
                case ParsingFunction.Read:
                    if (await _coreReader.ReadAsync().ConfigureAwait(false))
                    {
                        ProcessCoreReaderEvent();
                        return true;
                    }
                    else
                    {
                        _validator.CompleteValidation();
                        return false;
                    }
                case ParsingFunction.ParseDtdFromContext:
                    _parsingFunction = ParsingFunction.Read;
                    await ParseDtdFromParserContextAsync().ConfigureAwait(false);
                    goto case ParsingFunction.Read;
                case ParsingFunction.Error:
                case ParsingFunction.ReaderClosed:
                    return false;
                case ParsingFunction.Init:
                    _parsingFunction = ParsingFunction.Read; // this changes the value returned by ReadState
                    if (_coreReader.ReadState == ReadState.Interactive)
                    {
                        ProcessCoreReaderEvent();
                        return true;
                    }
                    else
                    {
                        goto case ParsingFunction.Read;
                    }
                case ParsingFunction.ResolveEntityInternally:
                    _parsingFunction = ParsingFunction.Read;
                    await ResolveEntityInternallyAsync().ConfigureAwait(false);
                    goto case ParsingFunction.Read;
                case ParsingFunction.InReadBinaryContent:
                    _parsingFunction = ParsingFunction.Read;
                    await _readBinaryHelper.FinishAsync().ConfigureAwait(false);
                    goto case ParsingFunction.Read;
                default:
                    Debug.Assert(false);
                    return false;
            }
        }