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New Post: Write to XLSX file issue

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Hi Team ,
I have facing a serious issue with xls or xlsx workbook to insert image through using NPOI library
in Xls we are to not able to add picture in this after calling the add picture method key was not found in this dictionary is shown or
with xlsx But when I try to open the created excel file, I got a message saying Excel found unreadable content in 'output.xlsx'. Do you want to recover the contents of this workbook?

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