[timrobinson]

It won't hang as long as you're redirecting only standard output. If you want to read both StandardOutput and StandardError, you need to do it from separate threads: either with explicit BeginInvoke/EndInvoke calls as in Kudu, or more simply, by listening on the OutputDataReceived/ErrorDataReceived events then calling BeginOutputReadLine/BeginErrorReadLine.

(The reason for this is that the two streams are redirected to separate pipes, each of which has its own fixed-size buffer. If you forget to read from one pipe while you read from the other, its buffer fills up, and the writer - the program being executed - blocks. With standard error redirection turned off, the program writes directly to the console, which is safe.)