Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

MemoryStream.SetLength Method

Sets the length of the current stream to the specified value.

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

public override void SetLength(
	long value
)

Parameters

value
Type: System.Int64

The value at which to set the length.

ExceptionCondition
NotSupportedException

The current stream is not resizable and value is larger than the current capacity.

-or-

The current stream does not support writing.

ArgumentOutOfRangeException

value is negative or is greater than the maximum length of the MemoryStream, where the maximum length is(MaxValue - origin), and origin is the index into the underlying buffer at which the stream starts.

This method overrides SetLength.

If the specified value is less than the current length of the stream, the stream is truncated. If after the truncation the current position within the stream is past the end of the stream, the ReadByte method returns -1, the Read method reads zero bytes into the provided byte array, and Write and WriteByte methods append specified bytes at the end of the stream, increasing its length. If the specified value is larger than the current capacity and the stream is resizable, the capacity is increased, and the current position within the stream is unchanged. If the length is increased, the contents of the stream between the old and the new length are initialized to zeros.

NoteNote

A MemoryStream instance must support writing for this method to work. Use the CanWrite property to determine whether the current instance supports writing. For additional information, see CanWrite.

.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.

Show:
© 2014 Microsoft