How to asynchronously read the standard output stream and standard error stream at once

Question

I want to read the ouput of a process in the form as is in a console (standard output is blended with standard error in one stream). Is there a way how to do it?

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Answer 1

I found the answer:

The output streams are buffered. There is no way to get the true sequential order of the items inserted into the streams. In fact it makes little sense as both streams can be written too at the same time. They are independent of each other. Therefore the best you can do is get the sequential output from each one as they arrive.

Generally this is not an issue though as almost all console apps use standard output for both output and error messages. The error stream is used by some apps but the messages are generally duplicates of the errors generated in the output stream.

Source: http://social.msdn.microsoft.com/Forums/uk/csharpgeneral/thread/192b6df7-9437-42cf-81c1-c125021735ba