>I haven't read this, but is has over 300 reviews and 3.9 stars. http://www.codeproject.com/Articles/9538/Exception-Handling-Best-Practices-in-NET

Do you know what is the purpose of this code? (taken from the link above)

try
{
    // Some code that throws an exception
}
catch (Exception ex)
{
    // some code that handles the exception
    throw;
}

I saw it in many places, but I never understood why would you catch an exception just to throw it again, would't it that the behaviour if you did not have the try in the first place?