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MemoryStream.Write Method

Writes a block of bytes to the current stream using data read from a buffer.

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

public override void Write(
	byte[] buffer,
	int offset,
	int count
)

Parameters

buffer
Type: System.Byte[]

The buffer to write data from.

offset
Type: System.Int32

The zero-based byte offset in buffer at which to begin copying bytes to the current stream.

count
Type: System.Int32

The maximum number of bytes to write.

ExceptionCondition
ArgumentNullException

buffer is null.

NotSupportedException

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

-or-

The current position is closer than count bytes to the end of the stream, and the capacity cannot be modified.

ArgumentException

offset subtracted from the buffer length is less than count.

ArgumentOutOfRangeException

offset or count are negative.

IOException

An I/O error occurs.

ObjectDisposedException

The current stream instance is closed.

This method overrides Write.

The offset parameter gives the offset of the first byte in buffer to write from, and the count parameter gives the number of bytes to write. If the write operation is successful, the current position within the stream is advanced by the number of bytes written. If an exception occurs, the current position within the stream is unchanged.

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 first string to the stream.
memStream.Write(firstString, 0 , firstString.Length);

.NET Framework

Supported in: 4.5, 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

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, 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.

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