getting this error while generating xlsx file in c#

Can not access a closed Stream.
System.ObjectDisposedException: Can not access a closed Stream.
   at System.IO.Compression.DeflateStream.EnsureNotDisposed()
   at MS.Internal.IO.Packaging.CompressStream.Flush()
   at MS.Internal.IO.Zip.ZipIOLocalFileBlock.FlushExposedStreams()
   at MS.Internal.IO.Zip.ZipIOLocalFileBlock.UpdateReferences(Boolean closingFlag)
   at MS.Internal.IO.Zip.ZipIOBlockManager.SaveContainer(Boolean closingFlag)
   at MS.Internal.IO.Zip.ZipIOBlockManager.SaveStream(ZipIOLocalFileBlock blockRequestingFlush, Boolean closingFlag)
   at MS.Internal.IO.Zip.ZipIOModeEnforcingStream.Dispose(Boolean disposing)
   at System.IO.Stream.Close()
   at System.IO.Packaging.PackagePart.Close()
   at System.IO.Packaging.Package.DoClose(PackagePart p)
   at System.IO.Packaging.Package.DoOperationOnEachPart(PartOperation operation)
   at System.IO.Packaging.Package.System.IDisposable.Dispose()
   at Infragistics.Documents.OfficeOpenXml.Core.OfficeDocumentManager.Dispose(Boolean disposing)
   at Infragistics.Documents.Excel.Serialization.WorkbookSaveManagerExcel2007.Dispose(Boolean disposing)
   at Infragistics.Documents.Excel.Workbook.SaveXLSXFileHelper(Stream stream, WorkbookSaveOptions saveOptions)
   at Infragistics.Documents.Excel.Workbook.Save(String fileName, WorkbookSaveOptions saveOptions)

Hello Rajesh, 

Thank you for contacting Infragistics. Please attach a sample project demonstrating the behavior. 

Have you resolved it? Or do you still need help?

Any update?

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How did you resolve the issue?
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That error usually means the file stream is getting closed before the workbook finishes saving. Try wrapping the save in a using (var stream = new FileStream(...)) { ... } block so it only disposes after the save is complete. Infragistics community