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PONinject, using two way property injection to resolve cyclic dependency
 

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    <p>Based on the answers in this question: <a href="https://stackoverflow.com/questions/3511547/cyclic-dependency-with-ninject">Cyclic dependency with ninject</a> and this questions: <a href="https://stackoverflow.com/questions/6180280/ninject-give-the-parent-instance-to-a-child-being-resolved">Ninject: give the parent instance to a child being resolved</a> both of these say you can use two way property injection to resolve cyclic dependencies as long as you change the scope to not be the default Transient Scope. So I tried doing that, I've got a <code>UserService</code> and a <code>GroupService</code> that require each other (and please don't say change the classes or use a third class, etc.!). I've got a generic <code>EntityServiceFactory</code> that uses ninject like so:</p> <pre><code>public static class EntityServiceFactory { public static TServiceClass GetService&lt;TServiceClass&gt;() where TServiceClass : class { IKernel kernel = new StandardKernel(); return kernel.Get&lt;TServiceClass&gt;(); } } </code></pre> <p>And my services:</p> <pre><code>public class GroupService : EntityService&lt;GroupRepository, Group, DbContext&gt; { public UserService _userService { private get; set; } public GroupService(GroupRepository repository, UserService userService) : base(repository) { userService._groupService = this; } public class UserService : EntityService&lt;UserRepository, User, DbContext&gt; { public GroupService _groupService { private get; set; } public UserService(UserRepository repository, GroupService groupService) : base(repository) { groupService._userService = this; } </code></pre> <p>Then as per the instructions in the answers to those questions add the following to my <code>EntityServiceFactory</code>:</p> <pre><code>kernel.Bind&lt;GroupService&gt;().ToSelf().InCallScope(); kernel.Bind&lt;UserService&gt;().ToSelf().InCallScope(); </code></pre> <p>But I still get the Error:</p> <blockquote> <p>A cyclical dependency was detected between the constructors of two services.</p> </blockquote> <p>Am I doing the two way property injection correctly? How do I resolve this?</p>
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    1. COI dont know the answer, but that is a well formed question. +1.
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    2. COI know you insist in us not nagging about your design, but could you explain why those two services need to depend on each other?
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    3. CObtw. the usage of your `EntityServiceFactory` smells like the Service Locator anti-pattern. You might want to read [this article](http://blog.ploeh.dk/2010/02/03/ServiceLocatorisanAnti-Pattern/) to verify if the use of this pattern could be problematic in your application.
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