public void Main()
    {
        try
        {
            String FilePath = Dts.Variables["$Package::DestinationFileName"].Value.ToString();
            String TableName = Dts.Variables["$Package::SourceTableName"].Value.ToString();
            String ConnStr = Dts.Variables["$Project::ConnStr_DataWarehouse"].Value.ToString();

            //SqlConnection Conn = (SqlConnection)(Dts.Connections["DW"].AcquireConnection(Dts.Transaction) as SqlConnection);
            using (SqlConnection Conn = new SqlConnection(ConnStr))
            {
                String Sql = "SELECT * FROM " + TableName;
                if (File.Exists(FilePath))
                {
                    try { File.Delete(FilePath); }
                    catch (Exception ex) { MessageBox.Show(ex.Message.ToString()); Dts.TaskResult = (int)ScriptResults.Failure; }
                }
                using (DataTable dt = new DataTable())
                {
                    using (SqlCommand cmd = new SqlCommand(Sql, Conn))
                    {
                        Conn.Open();
                        using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                        {
                            da.Fill(dt);
                            FileInfo newFile = new FileInfo(FilePath);
                            using (ExcelPackage p = new ExcelPackage(newFile))
                            {
                                using (ExcelWorksheet ws = p.Workbook.Worksheets.Add("RejectetionReport"))
                                {
                                    ws.Cells["A1"].LoadFromDataTable(dt, true);
                                    p.Save();
                                }
                            }
                        }
                        Conn.Close();
                    }
                }
            }

            Dts.TaskResult = (int)ScriptResults.Success;
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message.ToString());
            Dts.TaskResult = (int)ScriptResults.Failure;
        }
    }