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POUsing a class in its constructor C# - Does it smell?
 

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    <p>Does the code below smell? I'm refactoring some code and have discovered this circular relationship where foo needs a class which needs an interface which foo itself implements.</p> <p>In the real code, foo is a Silverlight UserControl and ifoo has methods to do UI type things like raise a dialog box (eg <code>ShowMessage</code>). The <code>needsAnIfoo</code> class is a (kind of) controller which uses the ifoo interface whenever it want's to do anything with the UI. I have different "themed" UI's which implement iFoo and have the same boiler plate code in their constructor. The <code>needsAnIfoo</code> has various properties which are databound to the UI (so it's kind of a model too.)</p> <p>It compiles and runs fine, but I'm wondering if there's a better way.</p> <p>So, does it smell?</p> <pre><code> interface ifoo { void bar(); } class foo : ifoo { readonly needsAnIfoo _needsAnIfoo; internal foo() { _needsAnIfoo = new needsAnIfoo(this); } #region ifoo Members public void bar() { throw new NotImplementedException(); } #endregion } class needsAnIfoo { readonly ifoo _myfoo; public needsAnIfoo(ifoo foo) { _myfoo = foo; } } static void Main(string[] args) { foo foo = new foo(); } </code></pre> <p>Perhaps I should new up the <code>needsAnIfoo</code> without passing the iFoo in the constructor and then give it the <code>iFoo</code> in an <code>Initialize</code> method. But this looks very odd:</p> <pre><code> foo foo = new foo(); needsAnIfoo needsAnIfoo = new needsAnIfoo(foo); foo.Initialise(needsAnIfoo); </code></pre>
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