System.IO.StreamReader.ReadToEnd C# (CSharp) Method

        public override string ReadToEnd()
        {
            if (_stream == null)
            {
                throw new ObjectDisposedException(null, SR.ObjectDisposed_ReaderClosed);
            }

            CheckAsyncTaskInProgress();

            // Call ReadBuffer, then pull data out of charBuffer.
            StringBuilder sb = new StringBuilder(_charLen - _charPos);
            do
            {
                sb.Append(_charBuffer, _charPos, _charLen - _charPos);
                _charPos = _charLen;  // Note we consumed these characters
                ReadBuffer();
            } while (_charLen > 0);
            return sb.ToString();
        }

        private void DlgTips_Load(object sender, EventArgs e)
        {   
            try
            {
                string strxml = "";
                using (StreamReader streamReader = new StreamReader(Assembly.GetExecutingAssembly().GetManifestResourceStream("Johnny.Kaixin.WinUI.Resources.Versions.config")))
                {
                    strxml = streamReader.ReadToEnd();
                }

                XmlDocument objXmlDoc = new XmlDocument();
                objXmlDoc.LoadXml(strxml);

                if (objXmlDoc == null)
                    return;

                DataView dv = GetData(objXmlDoc, "ZrAssistant/Versions");

                for (int ix = 0; ix < dv.Table.Rows.Count; ix++)
                {
                    _versionList.Add(dv.Table.Rows[ix][0].ToString(), dv.Table.Rows[ix][1].ToString());
                    cmbVersion.Items.Add(dv.Table.Rows[ix][0].ToString());
                }

                chkNeverDisplay.Checked = Properties.Settings.Default.NeverDisplay;
                cmbVersion.SelectedIndex = 0;
                SetTextValue();
                btnOk.Select();
            }
            catch (Exception ex)
            {
                Program.ShowMessageBox("DlgTips", ex);
            }
        }