XmlDocument excelData = new XmlDocument();
DataSet excelTableDataSet = new DataSet();
StreamReader excelContent = new StreamReader(excelFilePath, System.Text.Encoding.Default);
string stringConnectToExcelFile = string.Format("provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + excelFilePath + ";Extended Properties="Excel 12.0;"");
System.Data.OleDb.OleDbConnection oleConnectionToExcelFile = new System.Data.OleDb.OleDbConnection(stringConnectToExcelFile);
System.Data.OleDb.OleDbDataAdapter oleDataAdapterForGetExcelTable = new System.Data.OleDb.OleDbDataAdapter(string.Format("select * from [Sheet 1$]"), oleConnectionToExcelFile);
try
{
    oleDataAdapterForGetExcelTable.Fill(excelTableDataSet);
}
catch
{
    return null;
}
string excelOutputXml = Path.GetTempFileName();
excelTableDataSet.WriteXml(excelOutputXml);
excelData.Load(excelOutputXml);
File.Delete(excelOutputXml);
return excelData;