Notes on ExceptionChainPausingEx and ExceptionChainReplacingEx examples
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What we know:
+ entering "catch" block "pauses" the currently propagated exception
+ entering "finally" block "pauses" the currently propagated exception

What happens if new exception is thrown in "catch" or "finally" block?
+ it normally propagates
+ if there is a nested "catch" or "finally" block in the original catch/finally,
  pausing the new exception by the nested block does NOT replace the original exception,
  but new paused exception is pushed on top of a stack of paused exceptions, that CLR manages

For every "finally" block:
+ if NO exception propagates out of the "finally" block,
  the exception paused by it is unpaused and continues its propagation (and is removed from top of the paused exception stack)

+ if new exception propagates out of the "finally" block,
  then it replaces the exception "paused" by that "finally" block - the "paused" exception is removed from top of the paused stack,
  and its propagation is cancelled - ONLY the new exception propagates

For every "catch" block:
+ if NO exception propagates out of the "catch" block,
  the exception paused by it is handled (and is removed from top of the paused exception stack) and its propagation is cancelled

+ if NO exception propagates out of the "catch" block + the "paused" exception is rethrown via "throw;",
  the rethrown exception is unpaused and continues its propagation (and is removed from top of the paused exception stack)

+ if new exception propagates out of the "catch" block
  then it replaces the exception "paused" by that "catch" block - the "paused" exception is removed from top of the paused stack,
  and its propagation is cancelled - ONLY the new exception propagates

The ExceptionChainPausingEx and ExceptionChainReplacingEx show this on "finally" example.