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StreamWriter.Write Method (Char[], Int32, Int32)


Writes a subarray of characters to the stream.

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

public override void Write(
	char[] buffer,
	int index,
	int count


Type: System.Char[]

A character array that contains the data to write.

Type: System.Int32

The character position in the buffer at which to start reading data.

Type: System.Int32

The maximum number of characters to write.

Exception Condition

buffer is null.


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 System;
using System.IO;

public class SWBuff 
    public static void Main(String[] args)
        FileStream sb = new FileStream("MyFile.txt", FileMode.OpenOrCreate);
        char[] b = {'a','b','c','d','e','f','g','h','i','j','k','l','m'};
        StreamWriter sw = new StreamWriter(sb);
        sw.Write(b, 3, 8);

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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