The Stream you're talking about comes from the definition often used in functional languages, except that nobody else uses Stream in that manner. What Stream means by them and every other language is actually Pipes in Haskell: A data structure-y thing able to act as a Producer (generator), Consumer (iteratee), Pipe or stuff.

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

The most used Streams in C# are MemoryStream (a Stream held in memory, for reading from other arbitrary streams that might have be and ) and FileStream. Lots of other libraries and such implement their own Streams too, because data transfer in C# are very often utilized by Stream classes, and that Streams are much more widely used than in, say, Java.

I'm not too familiar with C#. Could you give some examples?

Don't forget that C# has various Streams too ;-)

That's not entirely correct. A Stream is an immutable data structure that includes lazy evaluation and sharing. It does not try to model an iterator (although you probably could provide one), it models infinite sequences.

A little modification is done. I think it is quite understandable now. Let me know what part is confusing to you?

It is still pretty bad

Thanks for feedback. Some modifiction have been added.