C# FileStream CopyTo(Stream, Int32)

Description

FileStream CopyTo(Stream, Int32) Reads the bytes from the current stream and writes them to another stream, using a specified buffer size.

Syntax

FileStream.CopyTo(Stream, Int32) has the following syntax.

public void CopyTo(
  Stream destination,
  int bufferSize
)

Parameters

FileStream.CopyTo(Stream, Int32) has the following parameters.

• destination - The stream to which the contents of the current stream will be copied.
• bufferSize - The size of the buffer. This value must be greater than zero. The default size is 4096.

Returns

FileStream.CopyTo(Stream, Int32) method returns

Example

//from  w ww.  j  av a  2s.  c  o  m
using System;
using System.IO;
public class MainClass
{
    public static void Main(String[] argv)
    {
        MemoryStream destination = new MemoryStream();
        using (FileStream source = File.Open(@"c:\temp\data.dat", FileMode.Open))
        {
            Console.WriteLine("Source length: {0}", source.Length.ToString());
            source.CopyTo(destination, 200);
        }
        Console.WriteLine("Destination length: {0}", destination.Length.ToString());
    }
}