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CryptoStream.Write Method

Writes a sequence of bytes to the current CryptoStream and advances the current position within this stream by the number of bytes written.

Namespace: System.Security.Cryptography
Assembly: mscorlib (in mscorlib.dll)

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



An array of bytes. This method copies count bytes from buffer to the current stream.


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


The number of bytes to be written to the current stream.

Exception typeCondition


The CryptoStreamMode associated with current CryptoStream object does not match the underlying stream. For example, this exception is thrown when using Write with an underlying stream that is read only.


The offset parameter is less than zero.


The count parameter is less than zero.


The sum of the count and offset parameters is longer than the length of the buffer.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0