What's the difference between Stream & File Stream?

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What's the actual difference in stream and filestream. i mention two instances below please explain what's the difference in below two lines. both are doing same work but i want to understand actual difference?

// Stream s = new FileStream(filename, FileMode.Create);

// FileStream fs = File.Create(filename);

Posted 9-Sep-15 8:52am

Arsalan Memon

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ZurdoDev · Answer 1 · 2015-09-09T09:04:00

Solution 1

See the documentation:

Stream: https://msdn.microsoft.com/en-us/library/system.io.stream(v=vs.110).aspx[^]

FileStream: https://msdn.microsoft.com/en-us/library/system.io.filestream(v=vs.110).aspx[^]

FileStream is clearly more specific for files and Stream is the base class for FileStream.

Posted 9-Sep-15 9:04am

ZurdoDev

Updated 9-Sep-15 10:22am

v2

Comments

Afzaal Ahmad Zeeshan 9-Sep-15 16:23pm

Updated your question to make it a candidate for my vote of 5. Hope that you don't mind. :-)

5ed.

Sergey Alexandrovich Kryukov · Answer 2 · 2015-09-09T09:07:00

This is a wrong, totally wrong question, as nearly all questions about "difference". In this particular case, this is the same as asking "what is the difference between penguin and bird?" Penguin is a bird, and FileStream is a Stream:
https://msdn.microsoft.com/en-us/library/system.io.filestream%28v=vs.110%29.aspx[^].

See also: https://msdn.microsoft.com/en-us/library/d62kzs03%28v=vs.110%29.aspx[^].

You really need to learn the basics of OOP.

In particular, you need to understand the compile-time types vs runtime types. In your first line, the constructor returns an instance of FileStream (as any constructor of the same time would do), but you abstract it up to the compile-time type Stream. Nevertheless, runtime type of the variable s is still FileStream. Please see: https://msdn.microsoft.com/en-us/library/47ek66wy%28v=vs.110%29.aspx[^].

And so on… Mind you, we are only discussing some prerequisites to OOP, but the "real" OOP plays fundamental role in these types; so you need to learn all those prerequisites (encapsulation, inheritance, and so on) really well, before you can really do any programming.

—SA