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UnmanagedMemoryStream::SetLength Method

Sets the length of a stream to a specified value.

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

public:
virtual void SetLength(
	long long value
) override

Parameters

value
Type: System::Int64

The length of the stream.

ExceptionCondition
IOException

An I/O error has occurred.

ObjectDisposedException

The stream is closed.

NotSupportedException

The underlying memory does not support writing.

- or -

An attempt is made to write to the stream and the CanWrite property is false.

ArgumentOutOfRangeException

The specified value exceeds the capacity of the stream.

- or -

The specified value is negative.

If the given value is less than the current length of the stream, the stream is truncated. If the given value is larger than the current length of the stream, the stream is expanded. If the stream is expanded, the contents of the stream between the old and the new lengths are undefined.

A stream must support both writing and seeking for SetLength to work.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.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.

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