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copied!<p>2 will be a performance killer (the necessary dynamic/relection <strong>invoke</strong> in particular is slow)</p> <p>1 is a common answer to this problem, especially with explicit implementation; the problem is getting hold of the type... does unity allow query with a <code>Type</code> instance, rather than via generics? If so something like below... of course, you might still have to use <code>MakeGenericType</code>:</p> <pre><code>Type intType = typeof(IProcessor<>).MakeGenericType(instanceType); IProcessor proc = (IProcessor) IoC.Resolve(intType); </code></pre> <p>Where <code>instanceType</code> is perhaps via <code>instance.GetType()</code>. For similar reasons, it might be helpful to expose the <code>T</code> as a <code>Type</code> on the <code>IProcessor</code>:</p> <pre><code>public interface IProcessor { void Process(object instance); Type InstanceType {get;} } public interface IProcessor<T> : IProcessor { void Process(T instance); } class SomeClass: IProcessor<int> { public void Process(int instance) { throw new NotImplementedException(); } Type IProcessor.InstanceType {get {return typeof(int);}} void IProcessor.Process(object instance) { Process((int)instance); } } </code></pre> <p>Of course, an (optional) base-class might allow you to avoid some of this per-implementation:</p> <pre><code>abstract class SomeBase<T> : IProcessor<T> { public void Process(T instance) { OnProcess(instance); } Type IProcessor.InstanceType {get {return typeof(T);}} void IProcessor.Process(object instance) { Process((T)instance); } protected abstract void OnProcess(T instance); } </code></pre>

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