C#: Throwing Custom Exception Best Practices

Question

I have read a few of the other questions regarding C# Exception Handling Practices but none seem to ask what I am looking for.

If I implement my own custom Exception

Answer 1

Have a look at this MSDN-best-practises.

Consider to use throw instead of throw ex if you want to re-throw caught exceptions, because on this way the original stacktrace keeps preserved(line numbers etc.).