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POIs it possible to assign an interface to an object at runtime?
 

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    <p>After reflecting upon all the great answers I received to my <a href="https://stackoverflow.com/questions/3389588/how-should-i-model-my-code-to-maximize-code-re-use-in-this-specific-situation">previous question about modeling my code to maximize code re-use</a>, I started wondering if it would be possible to assign the interface to an object at runtime instead of when it is coded.</p> <p>Take, for example, a simplified portion of code from <a href="https://stackoverflow.com/questions/3389588/how-should-i-model-my-code-to-maximize-code-re-use-in-this-specific-situation">my previous question</a>:</p> <pre><code>public class OutboxManager { private IVendorMessenger _VendorMessenger; //This is the default constructor, forcing the consumer to provide //the implementation of IVendorMessenger. public OutboxManager(IVendorMessenger messenger) { _VendorMessenger = messenger; } public void DistributeOutboxMessages() { VendorMessenger.SendMessageToVendor() _OutboxMgrDataProvider.MarkMessageAsProcessed(om) } } </code></pre> <p>Currently, if someone wants to consume this class, they have to code a class that implements <code>IVendorMessenger</code> and provide it during initialization as a parameter:</p> <pre><code> var MyOutboxManger = new OutboxManager(new MyVendorMessenger()) </code></pre> <p>What if, instead of hard-coding the interface parameter, it instead gets assinged at runtime? This way, I could compile a dll for a class that implements <code>IVendorMessenger</code>, drop it into the same folder that <code>OutboxManagerExecutable</code> exists, and it will wire everything up at run time. I suppose, using this logic, I could figure out a way to drop <em>multiple</em> implementations of <code>IVendorMessenger</code> in the same folder and design the executable to be smart enough to iterate through all appropriate dlls and consume them accordingly.</p> <p>Is this type of functionality possible in .NET 4?</p>
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    1. COAre you saying you want to take a class that does not implement IVendorMessenger, and at runtime plug that interface on top of it to say that it does?
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    2. CO@Lasse No, any class that I would want to plug in would assume `IVendorMessenger`
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