Major Description
When running tests from the command line via msbuild .\lang\cs\TestRunner.proj, all output is rendered into the command line window they were started from. This makes it very tricky to find a failed test's logs when there is considerable output after the failure. Also, the logs are word wrapped according to the window size at the time, which makes copy & paste awkward.
It would be better to follow the approach taken by Maven's surefire plugin, which creates a log file per test.