File.WriteAllLines Method (String, IEnumerable<String>)
Microsoft Silverlight will reach end of support after October 2021. Learn more.
When it is called by trusted applications, creates a new file, writes a collection of strings to the file, and then closes the file.
Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Shared Sub WriteAllLines ( _
path As String, _
contents As IEnumerable(Of String) _
)
public static void WriteAllLines(
string path,
IEnumerable<string> contents
)
Parameters
- path
Type: System.String
The file to write to.
- contents
Type: System.Collections.Generic.IEnumerable<String>
The lines to write to the file.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentException | path is a zero-length string, contains only white space, or contains one or more invalid characters defined by the GetInvalidPathChars method. |
| ArgumentNullException | Either path or contents is nulla null reference (Nothing in Visual Basic). |
| DirectoryNotFoundException | path is invalid (for example, it is on an unmapped drive). |
| FileNotFoundException | The file specified by path was not found. |
| IOException | An I/O error occurred while opening the file. |
| PathTooLongException | path exceeds 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. |
| NotSupportedException | path is in an invalid format. |
| SecurityException | The caller does not have the required permission. |
| UnauthorizedAccessException | path specifies a file that is read-only. -or- This operation is not supported on the current platform. -or- path is a directory. -or- The caller does not have the required permission. |
Remarks
For more information about trusted applications, see Trusted Applications.
If the target file already exists, it is overwritten.
You can use this method to create the contents for a collection class that takes an IEnumerable<T> in its constructor, such as a List<T>, or HashSet<T> class.
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.