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MemoryStream Constructor (Int32)

Initializes a new instance of the MemoryStream class with an expandable capacity initialized as specified.

Namespace:  System.IO
Assembly:  mscorlib (in mscorlib.dll)
public MemoryStream(
	int capacity
)

Parameters

capacity
Type: System.Int32

The initial size of the internal array in bytes.

ExceptionCondition
ArgumentOutOfRangeException

capacity is negative.

The CanRead, CanSeek, and CanWrite properties are all set to true.

The capacity automatically increases when you use the SetLength method to set the length to a value larger than the capacity of the current stream. Except for a MemoryStream constructed with a byte[] parameter, write operations at the end of a MemoryStream expand the MemoryStream.

This constructor exposes the underlying stream that GetBuffer returns.

This code example is part of a larger example provided for the MemoryStream class.

using(MemoryStream memStream = new MemoryStream(100))

.NET Framework

Supported in: 4.5.1, 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 8, Silverlight 8.1

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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