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Stream.CopyTo Method (Stream, Int32)

.NET Framework 4.5

Reads the bytes from the current stream and writes them to another stream, using a specified buffer size.

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

public void CopyTo(
	Stream destination,
	int bufferSize
)

Parameters

destination: Type: System.IO.Stream
The stream to which the contents of the current stream will be copied.

bufferSize: Type: System.Int32
The size of the buffer. This value must be greater than zero. The default size is 4096.

Exceptions

Exception	Condition
ArgumentNullException	destination is null.
ArgumentOutOfRangeException	bufferSize is negative or zero.
NotSupportedException	The current stream does not support reading. -or- destination does not support writing.
ObjectDisposedException	Either the current stream or destination were closed before the CopyTo method was called.
IOException	An I/O error occurred.

Remarks

Copying begins at the current position in the current stream.

Version Information

.NET Framework

Supported in: 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Platforms

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.

Reference

Stream Class

CopyTo Overload

System.IO Namespace

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