TextReader.ReadToEnd Method
Reads all characters from the current position to the end of the text reader and returns them as one string.
Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)
Return Value
Type: System.StringA string that contains all characters from the current position to the end of the text reader.
| Exception | Condition |
|---|---|
| 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 method throws an OutOfMemoryException exception, the reader's position in the underlying Stream is advanced by the number of characters the method was able to read, but the characters that were already read into the internal ReadToEnd buffer are discarded. Because the position of the reader in the stream cannot be changed, the characters that were 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.
The TextReader class is an abstract class. Therefore, you do instantiate it in your code. For an example of using the ReadToEnd method, see the StreamReader.ReadToEnd method.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
