i is 'Hello'
j is ''
js is null? True
x is ''
x1 is 'Hello'
s2 is null? True
x2 is ''
Can't call x2.Trim()! Exception: System.NullReferenceException: Object reference not set to an instance of an object.
at Program.Main() in c:\Windows\Temp\vu1kpcs2.0.cs:line 35