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copied!<p>I found a solution, still not sure if it's the best one. Seems kind of like brute force to me. </p> <p>The first thing I did was combine my Metadata classes into the same project / library as my Entity classes. Since my repository interface is IRepository<T>, the repository needed to be declared as IRepository<UserEntity>. This resolved the circular dependency I was talking about. Now I have UserEntity [depends on] UserMetadata [depends on] DuplicateUserValidationAttribute [depends on] DuplicateUserValidator [depends on] UserEntity. With all of these classes in the same library, though there is still circularity, there are no circular assembly dependencies. </p> <p>The second thing I did was wrap my IUnityContainer into a singleton and moved it to my cross-cutting utilities library (before it existed only in the MVC 3 project). </p> <p>Then, in my DuplicateUserValidator constructor, I could do the following:</p> <pre><code>public class DuplicateUserValidator : Micrsoft.Practices.EnterpriseLibrary.Validation.Validator<string> { public IRepository<UserEntity> UserRepository { get; set; } public DuplicateUserValidator(string tag) : base(string.Empty, tag) { IUnityContainer unity = UnityContainerSingleton.Get(); this.UserRepository = unity.Resolve<IRepository<UserEntity>>() as IRepository<UserEntity>; } } </code></pre> <p>Now I have a repository dependency injected into the custom entlib validator implementation. Wish I could get unity to automatically inject it into the constructor, maybe I'll look into that next. </p>

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