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MemoryStream.Write Method

Writes a block of bytes to the current stream using data read from 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 byte offset in buffer at which to begin writing from.

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.

For an example of creating a file and writing text to a file, see How to: Write Text to a File. For an example of reading text from a file, see How to: Read Text from a File. For an example of reading from and writing to a binary file, see How to: Read and Write to a Newly Created Data File.

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);

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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