private async Task OnSubmitAsync()
    {
            byte[] sheet = await _spreadsheetRef.ExportToExcelAsync();

            using MemoryStream ms = new(sheet);

            XlsxFormatProvider formatProvider = new();
            Workbook workbook = formatProvider.Import(ms, new TimeSpan(0, 0, 5));
            Worksheet worksheet = workbook.Worksheets.First();

            // The first time through this is correct, second time through it reports all 200 rows are in use. Why?
            CellRange cellRange = worksheet.UsedCellRange;

            // Validation logic would normally go here

            // Set the byte array back to the bound variable
            // Should I be doing this differently?
            ms.SetLength(0);
            formatProvider.Export(workbook, ms, new TimeSpan(0, 0, 30));
            _fileData = ms.ToArray(); // _fileData is bound to the TelerikSpreadsheet component
   }

            Workbook workbook = new Workbook();
            Worksheet worksheet = workbook.Worksheets.Add();

            IWorkbookFormatProvider formatProvider = new XlsxFormatProvider();
            using MemoryStream ms = new();
            formatProvider.Export(workbook, ms, new TimeSpan(0, 0, 30)); // This takes over 10 seconds

            _fileData = ms.ToArray(); // byte array that the Blazor component reads

 internal class DocGenerator
 {
     public void CreateDocument()
     {
         var document = new RadFixedDocument();
         var page = document.Pages.AddPage();
         page.Size = new Size(595, 842); // A4 size

         var editor = new FixedContentEditor(page);

         //editor.Position.Translate(0, 0);
         //FormSource barcode = FormSource.FromBarcode(Symbology1DType.Code128, "1234567890", width: 100, height: 100);
         //editor.DrawForm(barcode, 100, 100);

         editor.Position.Translate(20, 20);

         // Title
         editor.DrawText("P 24-07-2024 12:03");
         editor.Position.Translate(300, 20);
         editor.DrawText("Person X");

         // Aisle and Pallet
         editor.Position.Translate(20, 60);
         editor.DrawText("AISLE");
         editor.Position.Translate(100, 60);
         editor.TextProperties.FontSize = 36;
         editor.DrawText("A101");

         editor.Position.Translate(20, 150);
         editor.TextProperties.FontSize = 12;
         editor.DrawText("P");
         editor.Position.Translate(100, 150);
         editor.TextProperties.FontSize = 36;
         editor.DrawText("0237");

         AddBarcode(editor);


         editor.TextProperties.FontSize = 10;
         var blackColor =  new RgbColor(0, 0, 0);
         Table table = new Table();
                     table.Borders = new TableBorders(
             new Border(1, blackColor), // Top
             new Border(1, blackColor), // Right
             new Border(1, blackColor), // Bottom
             new Border(1, blackColor) // Left
         );

         AddTableRows(table);
         editor.Position.Translate(20, 240);
         editor.DrawTable(table);

         using (Stream output = File.OpenWrite(@"c:\temp\Output.pdf"))
         {
             PdfFormatProvider flowPdfProvider = new();
             flowPdfProvider.Export(document, output, new TimeSpan(0,0,10));
         }
     }

     private void AddBarcode(FixedContentEditor editor)
     {
         editor.Position.Translate(150, 150);
         FormSource barcodeWithCenterCenterText = FormSource.FromBarcode(Symbology1DType.Code128, "1234567890", showText: true);
         editor.DrawForm(barcodeWithCenterCenterText, 100, 100);
     }

     private void AddTableRows(Table table)
     {
         string[][] rows = new[]
         {
   new[] { "P", "PNo", "Brut", "Net", "Quality", "Pattern", "Pr", "Co", "Ac"  },
   new[] { "1000", "1001", "119,50", "118,70", "P1", "", "C1", "U1" },
   new[] { "1000", "1002", "120,00", "119,40", "P1", "", "C1", "U1" },
   new[] { "1000", "1003", "112,80", "112,10", "P1", "", "C1", "U1" },
   new[] { "1000", "1004", "120,50", "120,00", "P1", "", "C1", "U1" },
   new[] { "1000", "1005", "114,40", "113,50", "P1", "", "C1", "U1" },
   new[] { "1000", "1006", "114,40", "113,70", "P1", "", "C1", "U1" },
   new[] { "1000", "1007", "104,00", "102,60", "P1", "", "C1", "U1" },
   new[] { "1002", "1008", "99,80", "99,40", "P2", "", "C2", "H1" },
   new[] { "1002", "1009", "100,40", "100,00", "P2", "", "C2", "H1" },
   new[] { "1002", "1010", "100,40", "99,40", "P2", "", "C2", "H1" },
   new[] { "1002", "1011", "73,30", "72,50", "P2", "", "C2", "H1" },
   new[] { "1002", "1012", "100,00", "99,80", "P2", "", "C2", "H1" },
   new[] { "1002", "1013", "74,30", "73,80", "P2", "", "C2", "H1" },
   new[] { "1002", "1014", "105,00", "104,30", "P2", "", "C2", "H1" },
     };

         foreach (var rowValues in rows)
         {
             var row = table.Rows.AddTableRow();
             foreach (var value in rowValues)
             {
                 var cell = row.Cells.AddTableCell();
                 cell.Blocks.AddBlock().InsertText(value);
             }
         }
     }
}