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Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

How to: Append to Text Files in Visual Basic 

The My.Computer.FileSystem.WriteAllText Method can be used to append to a text file by specifying that the append parameter is set to True.

To append to a text file

  • Use the WriteAllText method, specifying the target file and string to be appended and setting the append parameter to True.

    This example writes the string "This is a test string." to the file named Testfile.txt.

    Dim inputString As String = "This is a test string."
    My.Computer.FileSystem.WriteAllText _
    ("C://testfile.txt", inputString, True)

Robust Programming

The following conditions may cause an exception:

See Also

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