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copied!<p>What you should do is create an empty membership provider that does nothing more than call into the MVC Dependency Resolver to fetch the real <code>Membership Provider</code>. By doing this you achieve three things:</p> <ul> <li>This implementation has a default constructor and can be configured in the web.config.</li> <li>The implementation is a MVC infrastructure component and is decoupled from the actual membership provider that contains the implementation (that you probably want to test).</li> <li>This infrastructure component has no dependency on Unity (or any other container), but just on MVC3 which lowers the coupling of the container itself.</li> </ul> <p>The implementation might look like this:</p> <pre><code>public class DependencyResolverMembershipProvider : MembershipProvider { private static MembershipProvider Provider { get { var provider = DependencyResolver.Current.GetService<MembershipProvider>(); if (provider == null) { throw new InvalidOperationException( "Make sure the MembershipProvider is registered."); } return provider; } } public override string ApplicationName { get { return Provider.ApplicationName; } set { Provider.ApplicationName = value; } } public override bool ChangePassword(string username, string oldPassword, string newPassword) { return Provider.ChangePassword(username, oldPassword, newPassword); } public override bool ChangePasswordQuestionAndAnswer(string username, string password, string newPasswordQuestion, string newPasswordAnswer) { return Provider.ChangePasswordQuestionAndAnswer(username, password, newPasswordQuestion, newPasswordAnswer); } public override MembershipUser CreateUser(string username, string password, string email, string passwordQuestion, string passwordAnswer, bool isApproved, object providerUserKey, out MembershipCreateStatus status) { return Provider.CreateUser(username, password, email, passwordQuestion, passwordAnswer, isApproved, providerUserKey, out status); } // Implement all other methods here } </code></pre> <p>This is still a lot of work, since the <code>MembershipProvider</code> has a lot of methods. There are two ways you can make this easier:</p> <ul> <li>Use a framework such as <a href="https://github.com/jgauffin/griffin.mvccontrib" rel="nofollow">Griffin.MvcContrib</a>, which already do such a thing for you and do it even in a more pleasant way, since it separates the responsibilities that are inside these classes and expose a few new interfaces that you can implement for this functionality.</li> <li>Prevent any part of the system of depending on the static <code>Membership</code> class, but always inject a <code>MembershipProvider</code> into those classes or even better: don't use the <code>MembershipProvider</code> but simply inject the interfaces that are probably behind that <code>MembershipProvider</code> (such as <code>IUserRepository</code> and <code>IPasswordManager</code>).</li> </ul>

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