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StreamWriter Constructor (String, Boolean)

July 28, 2014

Initializes a new instance of the StreamWriter class for the specified file on the specified path, using the default encoding and buffer size. If the file exists, it can be either overwritten or appended to. If the file does not exist, this constructor creates a new file.

Namespace:  System.IO
Assembly:  mscorlib (in mscorlib.dll)

public StreamWriter(
	string path,
	bool append
)

Parameters

path
Type: System.String
The complete file path to write to.
append
Type: System.Boolean
true to append data to an existing file; false to overwrite an existing file. If the specified file does not exist, a new file is created regardless of the value of this parameter.

ExceptionCondition
UnauthorizedAccessException

Access is denied.

ArgumentException

path is empty.

-or-

path contains the name of a system device (com1, com2, and so on).

ArgumentNullException

path is null.

DirectoryNotFoundException

The specified path is invalid; for example, it might refer to an unmapped drive.

IOException

path includes an incorrect or invalid syntax for file name, directory name, or volume label syntax.

PathTooLongException

The 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.

SecurityException

The caller does not have the required permission.

Version Notes

Windows Phone

 This member has a SecurityCriticalAttribute attribute. This attribute restricts this member to internal use. Application code that uses this member throws a MethodAccessException.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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