Function doesn't return a value on all code paths Vb.net

Question

I\'m somewhat new to programming and I am having trouble just making this work. I\'m supposed to run this code using a delegate but I\'ve run into error after error. I\'m usin

Answer 1

Your Function Fn1 doesn't return anything.

Functions by definition return something. If you want a method that doesn't return anything you should declare it Sub instead of Function

Your function should also declare the data type is is returning:

Public Function Concat(s1 As String, s2 As String) As String
    return s1 & s2
End Function