Article
11/18/2011

File.WriteAllText Method (String, String, Encoding)

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When it is called by trusted applications, creates a new file, writes the specified string to the file using the specified encoding, and then closes the file. If the target file already exists, it is overwritten.

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

Syntax

'Declaration
<SecuritySafeCriticalAttribute> _
Public Shared Sub WriteAllText ( _
    path As String, _
    contents As String, _
    encoding As Encoding _
)

[SecuritySafeCriticalAttribute]
public static void WriteAllText(
    string path,
    string contents,
    Encoding encoding
)

Parameters

path
Type: System.String
The file to write to.

contents
Type: System.String
The string to write to the file.

encoding
Type: System.Text.Encoding
An Encoding object that represents the encoding to apply to the string.

Exceptions

Exception	Condition
ArgumentException	path is a zero-length string, contains only white space, or contains one or more invalid characters as defined by GetInvalidPathChars.
ArgumentNullException	path is nulla null reference (Nothing in Visual Basic) or contents string is empty.
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.
DirectoryNotFoundException	The specified path is invalid (for example, it is on an unmapped drive).
IOException	An I/O error occurred while opening the file.
UnauthorizedAccessException	path specified a file that is read-only. -or- This operation is not supported on the current platform. -or- path specified a directory. -or- The caller does not have the required permission.
FileNotFoundException	The file specified in path was not found.
NotSupportedException	path is in an invalid format.
SecurityException	The caller does not have the required permission.

Remarks

For more information about trusted applications, see Trusted Applications.

Version Information

Silverlight

Supported in: 5, 4

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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