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MemoryStream Constructor (Byte[], Int32, Int32, Boolean, Boolean)

.NET Framework 1.1

Initializes a new instance of the MemoryStream class based on the specified region of a byte array, with the CanWrite property set as specified, and the ability to call GetBuffer set as specified.

[Visual Basic]
Public Sub New( _
   ByVal buffer() As Byte, _
   ByVal index As Integer, _
   ByVal count As Integer, _
   ByVal writable As Boolean, _
   ByVal publiclyVisible As Boolean _
public MemoryStream(
   byte[] buffer,
 int index,
 int count,
 bool writable,
 bool publiclyVisible
public: MemoryStream(
   unsigned char buffer __gc[],
 int index,
 int count,
 bool writable,
 bool publiclyVisible
public function MemoryStream(
   buffer : Byte[],
 index : int,
 count : int,
 writable : Boolean,
 publiclyVisible : Boolean


The array of unsigned bytes from which to create this stream.
The index into buffer at which the stream begins.
The length of the stream in bytes.
The setting of the CanWrite property, which determines whether the stream supports writing.
true to enable GetBuffer, which returns the unsigned byte array from which the stream was created; otherwise, false.


Exception Type Condition
ArgumentNullException buffer is a null reference (Nothing in Visual Basic).
ArgumentOutOfRangeException index or count is negative.
ArgumentException The buffer length minus index is less than count.


For an example of creating a file and writing text to a file, see Writing Text to a File. For an example of reading text from a file, see Reading Text from a File. For an example of reading from and writing to a binary file, see Reading and Writing to a Newly Created Data File.

The CanRead and CanSeek properties are both set to true. Capacity is set to count.

The new stream instance can be written to, but the Capacity of the underlying byte array cannot be changed. The length of the stream cannot be set to a value greater than the initial length of the specified byte array; however, the stream can be truncated (see SetLength).


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework, Common Language Infrastructure (CLI) Standard

See Also

MemoryStream Class | MemoryStream Members | System.IO Namespace | MemoryStream Constructor Overload List | Working with I/O | Reading Text from a File | Writing Text to a File