vb.net - Using For each loop without try-catch in Visual basic 2012 -

i have simple code:

public class form1 dim strfriends(4) string  private sub arrayelement_click(sender object, e eventargs) handles arrayelement.click     clearlist()       'try     each item string in strfriends         lstfriends.items.add(item)     next     'catch     'end try end sub  private sub clearlist()     lstfriends.items.clear() end sub  private sub form1_load(sender object, e eventargs) handles me.load      strfriends(0) = "tom"     strfriends(1) = "kate"     strfriends(2) = "bill"     strfriends(3) = "harry" end sub 

end class

if try-catch removed, system.argumentnullexception compulsory use try catch block use each?

try this:

if not string.isnullorempty(item)     ' add item end if 

update:

you can check see if array has in it, this:

if strfriends.length > 0     ' array end if