Article
11/18/2011

UnmanagedMemoryStream Class

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This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.

Provides access to unmanaged blocks of memory from managed code.

Inheritance Hierarchy

System.Object
System.IO.Stream
System.IO.UnmanagedMemoryStream

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

Syntax

'Declaration
Public Class UnmanagedMemoryStream _
    Inherits Stream

public class UnmanagedMemoryStream : Stream

The UnmanagedMemoryStream type exposes the following members.

Properties

	Name	Description
	CanRead	Infrastructure. Gets a value indicating whether a stream supports reading. (Overrides Stream.CanRead.)
	CanSeek	Infrastructure. Gets a value indicating whether a stream supports seeking. (Overrides Stream.CanSeek.)
	CanTimeout	Gets a value that determines whether the current stream can time out. (Inherited from Stream.)
	CanWrite	Infrastructure. Gets a value indicating whether a stream supports writing. (Overrides Stream.CanWrite.)
	Capacity	Infrastructure. Gets the stream length (size) or the total amount of memory assigned to a stream (capacity).
	Length	Infrastructure. Gets the length of the data in a stream. (Overrides Stream.Length.)
	Position	Infrastructure. Gets or sets the current position in a stream. (Overrides Stream.Position.)
	PositionPointer	Infrastructure. Gets or sets a byte pointer to a stream based on the current position in the stream.
	ReadTimeout	Gets or sets a value, in miliseconds, that determines how long the stream will attempt to read before timing out. (Inherited from Stream.)
	WriteTimeout	Gets or sets a value, in miliseconds, that determines how long the stream will attempt to write before timing out. (Inherited from Stream.)

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Methods

	Name	Description
	BeginRead	Begins an asynchronous read operation. (Inherited from Stream.)
	BeginWrite	Begins an asynchronous write operation. (Inherited from Stream.)
	Close	Closes the current stream and releases any resources (such as sockets and file handles) associated with the current stream. (Inherited from Stream.)
	CopyTo(Stream)	Reads all the bytes from the current stream and writes them to the destination stream. (Inherited from Stream.)
	CopyTo(Stream, Int32)	Reads all the bytes from the current stream and writes them to a destination stream, using a specified buffer size. (Inherited from Stream.)
	Dispose()	Releases all resources used by the Stream. (Inherited from Stream.)
	Dispose(Boolean)	Infrastructure. Releases the unmanaged resources used by the UnmanagedMemoryStream and optionally releases the managed resources. (Overrides Stream.Dispose(Boolean).)
	EndRead	Waits for the pending asynchronous read to complete. (Inherited from Stream.)
	EndWrite	Ends an asynchronous write operation. (Inherited from Stream.)
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	Flush	Infrastructure. Overrides the Flush method so that no action is performed. (Overrides Stream.Flush().)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	Read	Infrastructure. Reads the specified number of bytes into the specified array. (Overrides Stream.Read(array<Byte[], Int32, Int32).)
	ReadByte	Infrastructure. Reads a byte from a stream and advances the position within the stream by one byte, or returns -1 if at the end of the stream. (Overrides Stream.ReadByte().)
	Seek	Infrastructure. Sets the current position of the current stream to the given value. (Overrides Stream.Seek(Int64, SeekOrigin).)
	SetLength	Infrastructure. Sets the length of a stream to a specified value. (Overrides Stream.SetLength(Int64).)
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	Write	Infrastructure. Writes a block of bytes to the current stream using data from a buffer. (Overrides Stream.Write(array<Byte[], Int32, Int32).)
	WriteByte	Infrastructure. Writes a byte to the current position in the file stream. (Overrides Stream.WriteByte(Byte).)

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Remarks

This class supports access to unmanaged memory using the existing stream-based model and does not require that the contents in the unmanaged memory be copied to the heap.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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