public KPReportConfig(string relativeReportFile, KPReportDataSource[] dataSource)
     : this(relativeReportFile)
 {
     if (dataSource != null)
     {
         DataSources.AddRange(dataSource);
     }
 }
 public void AddDataSource(KPReportDataSource dataSource)
 {
     DataSources.Add(dataSource);
 }