![]() The file is in use by another process, or an I/O error occurs ( IOException). The path is not valid because it is Nothing ( ArgumentNullException).įile points to a path that does not exist ( FileNotFoundException or DirectoryNotFoundException). The path is not valid for one of the following reasons: it is a zero-length string, it contains only white space, it contains invalid characters, or it is a device path (starts with \\.\) ( ArgumentException). The following conditions may cause an exception: Dim inputString As String = "This is a test string." This example writes the string "This is a test string." to the file named Testfile.txt. Use the WriteAllText method, specifying the target file and string to be appended and setting the append parameter to True. The WriteAllText method can be used to append to a text file by specifying that the append parameter is set to True. ![]()
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December 2022
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