I Have a Multiple file in a folder i.e(.txt , .pdf , .doc , .xlsx) . and I want to read all the files and write a output in a excel. please help

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You can get all the files in a folder with Directory.GetFiles("C:\yourpath")

For each file you can then use the appropriate activity to read the data:

https://docs.uipath.com/activities/docs/read-text-file

https://docs.uipath.com/activities/docs/word-read-text

For writing the results in an excel file you can use write range.

If this has helped you, please mark this answer as the solution.