System.Xml.XmlTextReaderImpl.FinishInitUriString C# (CSharp) Method

        private void FinishInitUriString()
        {
            Stream stream = null;

            if (_laterInitParam.useAsync)
            {
                //this will be hit when user create a XmlReader by setting Async, but the first call is Read() instead of ReadAsync(), 
                //then we still should create an async stream here. And wait for the method finish.
                System.Threading.Tasks.Task<object> t = _laterInitParam.inputUriResolver.GetEntityAsync(_laterInitParam.inputbaseUri, string.Empty, typeof(Stream));
                t.Wait();
                stream = (Stream)t.Result;
            }
            else
            {
                stream = (Stream)_laterInitParam.inputUriResolver.GetEntity(_laterInitParam.inputbaseUri, string.Empty, typeof(Stream));
            }

            if (stream == null)
            {
                throw new XmlException(SR.Xml_CannotResolveUrl, _laterInitParam.inputUriStr);
            }

            Encoding enc = null;
            // get Encoding from XmlParserContext
            if (_laterInitParam.inputContext != null)
            {
                enc = _laterInitParam.inputContext.Encoding;
            }

            try
            {
                // init ParsingState
                InitStreamInput(_laterInitParam.inputbaseUri, _reportedBaseUri, stream, null, 0, enc);

                _reportedEncoding = _ps.encoding;

                // parse DTD
                if (_laterInitParam.inputContext != null && _laterInitParam.inputContext.HasDtdInfo)
                {
                    ProcessDtdFromParserContext(_laterInitParam.inputContext);
                }
            }
            catch
            {
                stream.Dispose();
                throw;
            }
            _laterInitParam = null;
        }