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StringReader.ReadLine Method

Reads a line from the underlying string.

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

public override string ReadLine()

Return Value

Type: System.String
The next line from the underlying string, or null if the end of the underlying string is reached.

ExceptionCondition
ObjectDisposedException

The current reader is closed.

OutOfMemoryException

There is insufficient memory to allocate a buffer for the returned string.

This method overrides the TextReader.ReadLine method.

A line is defined as a sequence of characters followed by a line feed ("\n"), a carriage return ("\r"), or a carriage return immediately followed by a line feed ("\r\n"). The resulting string does not contain the terminating carriage return and/or line feed. The returned value is null if the end of the underlying string has been reached.

If the current method throws an OutOfMemoryException, the reader's position in the underlying string is advanced by the number of characters the method was able to read, and the characters already read into the internal ReadLine buffer are discarded. Since the position of the reader in the string cannot be changed, the characters already read are unrecoverable, and can be accessed only by reinitializing the StringReader. To avoid such a situation and produce robust code you should use the Read method and store the read characters in a preallocated buffer.

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

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

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