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TextWriter.WriteLine Method (String, Object[])

Writes out a formatted string and a new line, using the same semantics as Format.

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

public virtual void WriteLine (
	string format,
	params Object[] arg
)
public void WriteLine (
	String format, 
	Object[] arg
)
public function WriteLine (
	format : String, 
	... arg : Object[]
)

Parameters

format

The formatting string.

arg

The object array to write into format string.

Exception typeCondition

ArgumentNullException

A string or object is passed in as a null reference (Nothing in Visual Basic).

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

FormatException

The format specification in format is invalid.

-or-

The number indicating an argument to be formatted is less than zero, or larger than or equal to arg.Length.

This method does not search the specified String for individual newline characters (hexadecimal 0x000a) and replace them with NewLine.

If a specified object is not referenced in the format string, it is ignored.

The following table lists examples of other typical or related I/O tasks.

To do this...

See the example in this topic...

Create a text file.

How to: Write Text to a File

Write to a text file.

How to: Write Text to a File

Read from a text file.

How to: Read Text from a File

Append text to a file.

How to: Open and Append to a Log File

File.AppendText

FileInfo.AppendText

Get the size of a file.

FileInfo.Length

Get the attributes of a file.

File.GetAttributes

Set the attributes of a file.

File.SetAttributes

Determine if a file exists.

File.Exists

Read from a binary file.

How to: Read and Write to a Newly Created Data File

Write to a binary file.

How to: Read and Write to a Newly Created Data File

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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