File.WriteAllBytes vs BinaryWriter?

Question

C++ / C#

There are several ways to write binary data to a file. One of them
File.WriteAllBytes (path, buffer);, the
other

BinaryWriter writer = new BinaryWriter (File.OpenWrite (path));<br/>
 writer.Write (buffer);<br/>
 writer.Flush ();

Offhand, the first way looks nicer (in terms of readability), but which one is faster?
And how do both methods work?
Thank you.

Answer 1

The first one opens a FileStream inside and writes bytes from the buffer into it. WriteAllBytes writes bytes to the stream with this line:
fs.Write(bytes, 0, bytes.Length);
Second, you yourself open a FileStream, for some reason you wrap it in a BinaryWriter. BinaryWriter writes to FileStream something like this:
OutStream.Write(buffer, 0, buffer.Length);
No difference. Only the first method closes the file. And the second one is not, it lacks a call to Dispose.