A chain of ``++If++``/``++ElseIf++`` statements is evaluated from top to bottom. At most, only one branch will be executed: the first one with a condition that evaluates to ``++True++``.


Therefore, duplicating a condition automatically leads to dead code. Usually, this is due to a copy/paste error. At best, it's simply dead code and at worst, it's a bug that is likely to induce further bugs as the code is maintained, and obviously it could lead to unexpected behavior.

== Noncompliant Code Example

[source,vbnet]
----
If param = 1 Then
  OpenWindow()
ElseIf param = 2 Then
  CloseWindow()
ElseIf param = 1 Then ' Noncompliant
  MoveWindowToTheBackground()
End If
----

== Compliant Solution

[source,vbnet]
----
If param = 1 Then
  OpenWindow()
ElseIf param = 2 Then
  CloseWindow()
ElseIf param = 3 Then
  MoveWindowToTheBackground()
End If
----


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'''
== Implementation Specification
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include::../message.adoc[]

include::../highlighting.adoc[]

'''
== Comments And Links
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include::../comments-and-links.adoc[]
endif::env-github,rspecator-view[]