Problem with exel after saveas overwrite data

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VB

MS-Excel

data

text

So I have written the below code that open my excel file and save it as text file

Dim xl As New Excel.Application
       Dim xlBook As Excel.Workbook = xl.Workbooks.Open("C:\ExcelData.xlsx")
       Dim xlSheet As Excel.Worksheet = xlBook.Sheets("Sheet1")

       xlSheet.SaveAs("C:\Data.txt", Excel.XlFileFormat.xlTextWindows)

       xlBook.Close

The problem is after it save the file i9t prompt me do you want to save changes and when I click Yes it overwrite the file with the latest opned sheet from the excel.

How can I stop it from overwriting and stop it from prompt me for changes?