WinForm Application for Reading and Writing very large XML File but winForm is Hang

[timone5666]

I trying to develop WinForm Application for Reading and Writing very large XML File also having two \[code\]buttons 1) for Writing XML File and 2) Reading XML File.\[/code\] while I click on Write XML Button my winForm is Hang no other opearation allowed to perform while writing to xml file but I want to read and write the into same xml file.For Reading\[code\] void btnReading_Click(object sender, EventArgs e) { strXpathQuery = "/AppXmlLogWritter/LogData[substring(LogDateTime, 1, 8) >='" + dateTimePickerFromDate.Value.ToString("yyyyMMdd") + "' and substring(LogDateTime, 1, 8) <='" + dateTimePickerToDate.Value.ToString("yyyyMMdd") + "']"; XmlElement objXmlRoot = null; XmlNodeList objxmlNodeList = objXmlRoot.SelectNodes(strXpathQuery); } void BindData(objxmlNodeList); { BindData(XmlNodeList objxmlNodeList)DataTable dataTable = new DataTable();dataTable = XmlNodeListToDataTable(objxmlNodeList, new string[] { "LogID", "LogDateTime"});lstViewInfo.View = View.Details;lstViewInfo.Clear();lstViewInfo.Columns.Add("LogID", Convert.ToInt32(lstViewInfo.Width * 0.20));lstViewInfo.Columns.Add("LogDateTime", Convert.ToInt32(lstViewInfo.Width * 0.20));ListViewItem objListViewitem = null;for (int i = 0; i < dataTable.Rows.Count; i++){ objListViewitem = new ListViewItem(); objListViewitem.Text = dataTable.Rows["LogID"].ToString(); objListViewitem.SubItems.Add(dataTable.Rows["LogDateTime"].ToString()); lstViewInfo.Items.Add(objListViewitem);}}\[/code\]For Writing \[code\] void button1_Click(object sender, EventArgs e) { Mutex objMutex = new Mutex(false, @"Global\MySharedLog"); XmlDocument xmlDoc = new XmlDocument(); string currentDateTime = DateTime.Now.ToString("yyyyMMddHHmmss"); XmlElement newelement = xmlDoc.CreateElement("LogData"); XmlElement xmlLogID = xmlDoc.CreateElement("LogID"); XmlElement xmlLogDateTime = xmlDoc.CreateElement("LogDateTime"); int randomNumber = random.Next(9999); xmlLogID.InnerText = _logIDPrefix + currentDateTime + DateTime.UtcNow.Ticks + randomNumber; xmlLogDateTime.InnerText = currentDateTime; newelement.AppendChild(xmlLogID); newelement.AppendChild(xmlLogDateTime); try { objMutex.WaitOne(); if (!File.Exists(_logFilePath)) { File.WriteAllText(_logFilePath, "<?xml version='1.0' encoding='utf-8' standalone='yes'?>\r\n<AppXmlLogWritter><objMutex></objMutex></AppXmlLogWritter>"); } using (FileStream fileStream = new FileStream(_logFilePath, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite)) { xmlDoc.Load(fileStream); xmlDoc.DocumentElement.AppendChild(newelement); fileStream.SetLength(0); xmlDoc.Save(fileStream); } } finally { objMutex.ReleaseMutex(); } }\[/code\]