Merge multiple xml from same folder

Hello ..

Can anyone give me code to merge multiple xml using dataset and xsl.

Write now i am using this code.. but I am not getting proper result.

   private void Form1_Load(object sender, EventArgs e)
        {
            string xmlFolder = @"D:\MergeXML\zillowfiles";
            //Call method which will read all XML files inside the Folder
            MergeXML(xmlFolder);

            //Finally write new XML from comon Dataset
            dsAllFiles.WriteXml(xmlFolder + "\\" + "zillowcommon.xml");
        }

        private void MergeXML(string xmlFolder)
        {
            XmlTextReader xmlreader;
            //There can be a lot of files in the Folder, so get only the zillow xml files from the Folder
            DirectoryInfo rootFolder = new DirectoryInfo(xmlFolder);
            FileInfo[] zillowFiles = rootFolder.GetFiles("*zillow.xml");

            //Loop through the Folder for all zillow files
            foreach (FileInfo fileInfo in zillowFiles)
            {
                SendFileForMerge(fileInfo.FullName);
            }


        }

        private void SendFileForMerge(string zillowFile)
        {
            try
            {
                //Read Zillow file using XMLTextReader
                XmlTextReader xmlTextReader = new XmlTextReader(zillowFile);

                //Create a Dataset from XMLTextReader
                DataSet dsTemp = new DataSet();
                dsTemp.ReadXml(xmlTextReader);
                
                //Merge created Dataset with common Dataset
                dsAllFiles.Merge(dsTemp,false);
            }
            catch (System.Exception ex)
            {
                Console.Write(ex.Message);
            }
        }
    }

Please tell me what i have to do ...