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FileAppendText Method
Creates a StreamWriter that appends UTF-8 encoded text to an existing file.

Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll) Version: 4.0.0.0
Syntax
C#
public static StreamWriter AppendText(
	string path
)

Parameters

path
Type: SystemString
The path to the file to append to.

Return Value

Type: StreamWriter
A StreamWriter that appends UTF-8 encoded text to an existing file.
Exceptions
ExceptionCondition
UnauthorizedAccessExceptionThe caller does not have the required permission.
ArgumentExceptionpath is a zero-length string, contains only white space, or contains one or more invalid characters as defined by InvalidPathChars.
ArgumentNullExceptionpath is null.
PathTooLongExceptionThe specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters.
DirectoryNotFoundExceptionThe specified path is invalid (for example, it is on an unmapped drive).
NotSupportedExceptionpath is in an invalid format.
See Also