Welcome to the Lounge

using (FileStream stream = File.OpenRead("C:\\veer1.raw"))
using (FileStream writeStream = File.OpenWrite("D:\\file.raw"))
{
    BinaryReader reader = new BinaryReader(stream);
    BinaryWriter writer = new BinaryWriter(writeStream);

    // create a buffer to hold the bytes
    byte[] buffer = new Byte[1024];
    int bytesRead;

    // while the read method returns bytes
    // keep writing them to the output stream
    while ((bytesRead =
            stream.Read(buffer, 0, 1024)) > 0)
    {
        writeStream.Write(buffer, 0, bytesRead);
    }