c# - How to handle an exception without closing application? -

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i have try catch sending email through wpf c# application followed:

try { smtpmail.send(message); }             catch (exception err) { throw new customexception("error contacting server.", err); }

however, don't want application stop running/crash if error hit. rather, change error error message textbox have set within application...or related not crashing application , rather informing user try again later (or if problem persists: contact so-and-so).

edit: expectation: error logged, user sees this,

errormsg.text = "error contacting server. try again later, or if problem persists contact billy bob boo";

how go implementing this?

update: apologies unclear question. needed on how go logging error display friendly error message user...but asked poorly. using comments , answer provided, researched bit more answered own question below. thanks, everyone! :)

why catching exception , throwing again? doesn't seem effective.

you use messagebox...

try {      smtpmail.send(message);  }catch (exception err) {      messagebox.show(err.message, "exception", messageboxbutton.ok, messageboximage.error); }

edit: said don't wantd user know exception. well, leave catch block empty :)


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