ReadByte Method

Stream.ReadByte Method ()


Reads a byte from the stream and advances the position within the stream by one byte, or returns -1 if at the end of the stream.

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

public virtual int ReadByte()

Return Value

Type: System.Int32

The unsigned byte cast to an Int32, or -1 if at the end of the stream.

Exception Condition

The stream does not support reading.


Methods were called after the stream was closed.

Use the CanRead property to determine whether the current instance supports reading.

Attempts to manipulate the stream after the stream has been closed could throw an ObjectDisposedException.

Notes to Implementers:

The default implementation on Stream creates a new single-byte array and then calls Read. While this is formally correct, it is inefficient. Any stream with an internal buffer should override this method and provide a much more efficient version that reads the buffer directly, avoiding the extra array allocation on every call.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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