WriteByte Method

MemoryStream.WriteByte Method (Byte)


Writes a byte to the current stream at the current position.

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

public override void WriteByte(
	byte value


Type: System.Byte

The byte to write.

Exception Condition

The stream does not support writing. For additional information see CanWrite.


The current position is at the end of the stream, and the capacity cannot be modified.


The current stream is closed.

This method overrides WriteByte.

Except for a MemoryStream constructed with a byte[] parameter, write operations at the end of a MemoryStream expand the MemoryStream.

This code example is part of a larger example provided for the MemoryStream class.

// Write the second string to the stream, byte by byte.
count = 0;
while(count < secondString.Length)

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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