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BinaryWriter Constructor (Stream, Encoding, Boolean)

.NET Framework 4.5

Initializes a new instance of the BinaryWriter class based on the specified stream and character encoding, and optionally leaves the stream open.

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

public BinaryWriter(
	Stream output,
	Encoding encoding,
	bool leaveOpen


Type: System.IO.Stream

The output stream.

Type: System.Text.Encoding

The character encoding to use.

Type: System.Boolean

true to leave the stream open after the BinaryWriter object is disposed; otherwise, false.


The stream does not support writing or is already closed.


output or encoding is null.

.NET Framework

Supported in: 4.6, 4.5

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: 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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