This rule applies whenever an If statement is followed by one or more ElseIf statements; the final ElseIf
should be followed by an Else statement.
The requirement for a final Else statement is defensive programming.
The Else statement should either take appropriate action or contain a suitable comment as to why no action is taken. This is
consistent with the requirement to have a final Case Else clause in a Select Case statement.
Noncompliant code example
If x = 0 Then
DoSomething()
ElseIf x = 1 Then
DoSomethingElse()
End If
Compliant solution
If x = 0 Then
DoSomething()
ElseIf x = 1 Then
DoSomethingElse()
Else
Throw New ArgumentException("...")
End If
Exceptions
None
