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: ![]() "C:\Documents and Settings\FileList.txt", foundFile, True) This example writes the names of the files in the Documents and Settings directory to FileList.txt, inserting a carriage return between each for better readability. Use the WriteAllText method to write text to a file, specifying the target file and string to be added and setting append to True. This example writes the line "This is new text." to the file named test.txt, appending the text to any existing text in the file. ![]() Use the WriteAllText method to write text to a file, specifying the file and text to be written. If the specified file does not exist, it is created. The WriteAllText method can be used to write text to files.
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