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Copy file name to clipboardExpand all lines: Document-Processing/Excel/Excel-Library/NET/faqs/how-to-avoid-exception-when-adding-worksheets-with-same-name.md
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# How to avoid exception when adding worksheets with same name?
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Microsoft Excel throws exception when adding worksheet with existing worksheet name in a workbook and XlsIO does the same. But in some case, if you want to add worksheets with the same name using XlsIO then you can avoid the exception in XlsIO by setting [IgnoreSheetNameException](https://help.syncfusion.com/cr/file-formats/Syncfusion.XlsIO.IApplication.html#Syncfusion_XlsIO_IApplication_IgnoreSheetNameException) property of [IApplication](https://help.syncfusion.com/cr/file-formats/Syncfusion.XlsIO.IApplication.html) as true.
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Microsoft Excel throws exception when adding worksheet with existing worksheet name in a workbook and XlsIO does the same. But in some case, if you want to add worksheets with the same name using XlsIO then you can avoid the exception in XlsIO by setting [IgnoreSheetNameException](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.IApplication.html#Syncfusion_XlsIO_IApplication_IgnoreSheetNameException) property of [IApplication](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.IApplication.html) as true.
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The following code snippet shows how to add two worksheets with same name in a workbook.
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## See Also
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*[How to overcome UnauthorizedAccessException?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-overcome-unauthorizedaccessexception)
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*[How to overcome StackOverflow exception with IWorksheet Calculate()?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-overcome-stackoverflow-exception-with-iworksheet-calculate)
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*[What are the known exceptions of XlsIO?](https://help.syncfusion.com/file-formats/xlsio/known-exceptions)
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*[How to create a named range in Excel?](https://help.syncfusion.com/file-formats/xlsio/migrate-from-office-automation-to-syncfusion-xlsio/create-named-range-in-excel)
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*[How to use Named Ranges with XlsIO?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-use-named-ranges-with-xlsio)
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*[How to overcome UnauthorizedAccessException?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-overcome-unauthorizedaccessexception)
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*[How to overcome StackOverflow exception with IWorksheet Calculate()?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-overcome-stackoverflow-exception-with-iworksheet-calculate)
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*[What are the known exceptions of XlsIO?](https://help.syncfusion.com/document-processing/excel/excel-library/net/known-exceptions)
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*[How to create a named range in Excel?](https://help.syncfusion.com/document-processing/excel/excel-library/net/migrate-from-office-automation-to-syncfusion-xlsio/create-named-range-in-excel)
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*[How to use Named Ranges with XlsIO?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-use-named-ranges-with-xlsio)
Copy file name to clipboardExpand all lines: Document-Processing/Excel/Excel-Library/NET/faqs/how-to-hide-the-summary-rows-and-columns-using-xlsio.md
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# How to hide the summary rows and columns using XlsIO?
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You can hide the summary rows and columns by using the [IsSummaryRowBelow](https://help.syncfusion.com/cr/file-formats/Syncfusion.XlsIO.IPageSetup.html#Syncfusion_XlsIO_IPageSetup_IsSummaryRowBelow) and [IsSummaryColumnRight](https://help.syncfusion.com/cr/file-formats/Syncfusion.XlsIO.IPageSetup.html#Syncfusion_XlsIO_IPageSetup_IsSummaryColumnRight) properties. The following code snippet illustrates this.
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You can hide the summary rows and columns by using the [IsSummaryRowBelow](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.IPageSetup.html#Syncfusion_XlsIO_IPageSetup_IsSummaryRowBelow) and [IsSummaryColumnRight](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.IPageSetup.html#Syncfusion_XlsIO_IPageSetup_IsSummaryColumnRight) properties. The following code snippet illustrates this.
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{% tabs %}
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{% highlight c# tabtitle="C# [Cross-platform]" %}
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## See Also
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*[What is the maximum range of Rows and Columns?](https://help.syncfusion.com/file-formats/xlsio/faqs/what-is-the-maximum-range-of-rows-and-columns)
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*[How to unfreeze the rows and columns in XlsIO?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-unfreeze-the-rows-and-columns-in-xlsio)
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*[How to sort two or more columns in a pivot table?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-sort-two-or-more-columns-in-a-pivot-table)
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*[How to hide Excel worksheets?](https://help.syncfusion.com/file-formats/xlsio/migrate-from-office-automation-to-syncfusion-xlsio/hide-excel-worksheets)
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*[How to show or hide rows and columns?](https://help.syncfusion.com/file-formats/xlsio/worksheet-rows-and-columns-manipulation#show-or-hide-rows-and-columns)
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*[How to show or hide specific range?](https://help.syncfusion.com/file-formats/xlsio/worksheet-rows-and-columns-manipulation#show-or-hide-specific-range)
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*[What is the maximum range of Rows and Columns?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/what-is-the-maximum-range-of-rows-and-columns)
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*[How to unfreeze the rows and columns in XlsIO?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-unfreeze-the-rows-and-columns-in-xlsio)
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*[How to sort two or more columns in a pivot table?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-sort-two-or-more-columns-in-a-pivot-table)
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*[How to hide Excel worksheets?](https://help.syncfusion.com/document-processing/excel/excel-library/net/migrate-from-office-automation-to-syncfusion-xlsio/hide-excel-worksheets)
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*[How to show or hide rows and columns?](https://help.syncfusion.com/document-processing/excel/excel-library/net/worksheet-rows-and-columns-manipulation#show-or-hide-rows-and-columns)
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*[How to show or hide specific range?](https://help.syncfusion.com/document-processing/excel/excel-library/net/worksheet-rows-and-columns-manipulation#show-or-hide-specific-range)
Copy file name to clipboardExpand all lines: Document-Processing/Excel/Excel-Library/NET/faqs/how-to-open-an-excel-file-from-stream.md
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## See Also
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*[How to open an Excel 2013 Macro Enabled Template?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-open-an-excel-2013-macro-enabled-template)
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*[How to create and open Excel Template files by using XlsIO?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-create-and-open-excel-template-files-by-using-xlsio)
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*[How to open an existing workbook from stream?](https://help.syncfusion.com/file-formats/xlsio/loading-and-saving-workbook#opening-an-existing-workbook-from-stream)
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*[How to open a CSV file?](https://help.syncfusion.com/file-formats/xlsio/working-with-excel-worksheet#open-a-csv-file)
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*[How to open an existing XLSX workbook and save it as XLS?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-open-an-existing-xlsx-workbook-and-save-it-as-xls)
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*[How to resolve the File does not contain workbook stream error in Syncfusion.XlsIO.Base.dll?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-resolve-the-file-does-not-contain-workbook-stream-error)
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*[How to resolve Excel cannot open the file filename.xlsx... error?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-resolve-excel-cannot-open-the-file-because-the-file-format-for-the-file-extension-is-not-valid)
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*[How to save a file to stream?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-save-a-file-to-stream)
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*[How to merge excel files from more than one workbook to a single file?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-merge-excel-files-from-more-than-one-workbook-to-a-single-file)
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*[Does XlsIO support Excel files with macros that are digitally signed?](https://help.syncfusion.com/file-formats/xlsio/faqs/does-xlsio-support-excel-files-with-macros-that-are-digitally-signed)
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*[How does Excel file with uninstalled fonts is converted to PDF/Image?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-does-excel-file-with-uninstalled-fonts-is-converted-to-pdf-image)
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*[How to open an Excel 2013 Macro Enabled Template?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-open-an-excel-2013-macro-enabled-template)
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*[How to create and open Excel Template files by using XlsIO?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-create-and-open-excel-template-files-by-using-xlsio)
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*[How to open an existing workbook from stream?](https://help.syncfusion.com/document-processing/excel/excel-library/net/loading-and-saving-workbook#opening-an-existing-workbook-from-stream)
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*[How to open a CSV file?](https://help.syncfusion.com/document-processing/excel/excel-library/net/working-with-excel-worksheet#open-a-csv-file)
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*[How to open an existing XLSX workbook and save it as XLS?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-open-an-existing-xlsx-workbook-and-save-it-as-xls)
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*[How to resolve the File does not contain workbook stream error in Syncfusion.XlsIO.Base.dll?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-resolve-the-file-does-not-contain-workbook-stream-error)
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*[How to resolve Excel cannot open the file filename.xlsx... error?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-resolve-excel-cannot-open-the-file-because-the-file-format-for-the-file-extension-is-not-valid)
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*[How to save a file to stream?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-save-a-file-to-stream)
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*[How to merge excel files from more than one workbook to a single file?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-merge-excel-files-from-more-than-one-workbook-to-a-single-file)
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*[Does XlsIO support Excel files with macros that are digitally signed?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/does-xlsio-support-excel-files-with-macros-that-are-digitally-signed)
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*[How does Excel file with uninstalled fonts is converted to PDF/Image?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-does-excel-file-with-uninstalled-fonts-is-converted-to-pdf-image)
Copy file name to clipboardExpand all lines: Document-Processing/Excel/Excel-Library/NET/faqs/how-to-overcome-unauthorizedaccessexception.md
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## See Also
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*[How to overcome StackOverflow exception with IWorksheet Calculate()?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-overcome-stackoverflow-exception-with-iworksheet-calculate)
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*[How to avoid exception when adding worksheets with same name?](https://help.syncfusion.com/file-formats/xlsio/faqs/how-to-avoid-exception-when-adding-worksheets-with-same-name)
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*[What are the known exceptions of XlsIO?](https://help.syncfusion.com/file-formats/xlsio/known-exceptions)
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*[How to secure Excel documents?](https://help.syncfusion.com/file-formats/xlsio/security)
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*[How to overcome StackOverflow exception with IWorksheet Calculate()?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-overcome-stackoverflow-exception-with-iworksheet-calculate)
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*[How to avoid exception when adding worksheets with same name?](https://help.syncfusion.com/document-processing/excel/excel-library/net/faqs/how-to-avoid-exception-when-adding-worksheets-with-same-name)
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*[What are the known exceptions of XlsIO?](https://help.syncfusion.com/document-processing/excel/excel-library/net/known-exceptions)
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*[How to secure Excel documents?](https://help.syncfusion.com/document-processing/excel/excel-library/net/security)
The document can be saved as a file stream to the file system using IWorkbook SaveAsJson(Stream stream)
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{{'[IWorksheet ImportHtmlTable(string filename, int row, int column)](https://help.syncfusion.com/cr/file-formats/Syncfusion.XlsIO.IWorksheet.html#Syncfusion_XlsIO_IWorksheet_ImportHtmlTable_System_String_System_Int32_System_Int32_)'| markdownify}}
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{{'[IWorksheet ImportHtmlTable(string filename, int row, int column)](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.IWorksheet.html#Syncfusion_XlsIO_IWorksheet_ImportHtmlTable_System_String_System_Int32_System_Int32_)'| markdownify}}
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The HTML table can be imported as a file stream from the file system using IWorksheet ImportHtmlTable(Stream stream, int row, int column)
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{{'[IPictures Add(int row, int column, string filename)](https://help.syncfusion.com/cr/file-formats/Syncfusion.XlsIO.IPictures.html#Syncfusion_XlsIO_IPictures_AddPicture_System_Int32_System_Int32_System_Int32_System_Int32_System_String_)'| markdownify}}
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{{'[IPictures Add(int row, int column, string filename)](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.IPictures.html#Syncfusion_XlsIO_IPictures_AddPicture_System_Int32_System_Int32_System_Int32_System_Int32_System_String_)'| markdownify}}
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A picture can be added as a stream from the file system using IPictures Add(int row, int column, Stream stream)
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