C# Circular Dependancy

L M

16y3.6kSoftware Architecture/Engineering

Hi all,

Design question, I have three library projects, A, B and C.

Project A - error logging class
Project B - properties class with static methods
Project C - eventing class with static methods

Unfortunately, I want project A to use the properties class B, B to use the eventing class C, and C to contain an error logger object, resulting in a circular dependancy:

A <> B <> C <> A

How can I get around / redesign this? I'm a bit of a novice and might be missing the obvious but I don't see how I can use an interface, as C contains an error logging object, it is not passed an error logger as a method parameter.

Thanks in advance, am so confused!

1 Reply

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Kirtan Patel16y ago

Accepted answer

Here is Example of Four Circular Dependency .. A->B->C->D->A

if my answer helps you then check "Do you like this answer" check box please :)

Project A

Public Class A Implements C.IA

Public Function foo(ByVal value As C.IB) As Integer Implements C.IA.foo
    Return value.bar(Me)
End Function

End Class

Project B

Public Class B Implements C.IB

Public Function bar(ByVal value As C.IA) As Integer Implements C.IB.bar
    Return value.foo(Me)
End Function

End Class

Project C

Public Interface IA
    Function foo(ByVal value As IB) As Integer
End Interface

Public Interface IB
    Function bar(ByVal value As IA) As Integer
End Interface

Project D

Sub Main()

    Dim a As New A.A
    Dim b As New B.B

    a.foo(b)

End Sub