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TextReader.ReadToEnd Method

Reads all characters from the current position to the end of the TextReader and returns them as one string.

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

public virtual string ReadToEnd()

Return Value

Type: System.String
A string containing all characters from the current position to the end of the TextReader.

ExceptionCondition
IOException

An I/O error occurs.

ObjectDisposedException

The TextReader is closed.

OutOfMemoryException

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

ArgumentOutOfRangeException

The number of characters in the next line is larger than MaxValue

If the current method throws an OutOfMemoryException, the reader's position in the underlying Stream is advanced by the number of characters the method was able to read, but the characters already read into the internal ReadToEnd buffer are discarded. Since the position of the reader in the stream cannot be changed, the characters already read are unrecoverable, and can be accessed only by reinitializing the TextReader. If the initial position within the stream is unknown or the stream does not support seeking, the underlying Stream also needs to be reinitialized.

To avoid such a situation and produce robust code you should use the Read method and store the read characters in a preallocated buffer.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

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