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StreamWriter::Write Method (array<Char>, Int32, Int32)

Writes a subarray of characters to the stream.

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

virtual void Write(
	array<wchar_t>^ buffer, 
	int index, 
	int count
) override


Type: array<System::Char>
A character array containing the data to write.
Type: System::Int32
The index into buffer at which to begin writing.
Type: System::Int32
The number of characters to read from buffer.


buffer is nullptr.


The buffer length minus index is less than count.


index or count is negative.


An I/O error occurs.


AutoFlush is true or the StreamWriter buffer is full, and current writer is closed.


AutoFlush is true or the StreamWriter buffer is full, and the contents of the buffer cannot be written to the underlying fixed size stream because the StreamWriter is at the end the stream.

This method overrides TextWriter::Write.

The characters are read from buffer beginning at index and continuing through index + (count - 1). All characters are written to the underlying stream unless the end of the underlying stream is reached prematurely. Flush is invoked automatically if AutoFlush is true.

For a list of common I/O tasks, see Common I/O Tasks.

This example writes eight characters from a 13-element array to a file, beginning at the third element of the array.

using namespace System;
using namespace System::IO;

int main()
   FileStream^ sb = gcnew FileStream( "MyFile.txt",FileMode::OpenOrCreate );
   array<Char>^b = {'a','b','c','d','e','f','g','h','i','j','k','l','m'};
   StreamWriter^ sw = gcnew StreamWriter( sb );
   sw->Write( b, 3, 8 );

.NET Framework

Supported in: 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

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.