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copied!<p>Could you just check to see if your command variable is of the type? If when this command object was instantiated, it inherited from it, it will return true.</p> <pre><code>if(command is IUpdateAggregateCommand<TAggregate>) </code></pre> <p>Then you'll just:</p> <pre><code>var newCommand = ((IUpdateAggregateCommand<TAggregate>)command); </code></pre> <p>or</p> <pre><code>var newCommand = command as IUpdateAggregateCommand<TAggregate>; </code></pre> <hr> <p>With your update that you don't know what to cast it to, you could continue using Reflection which is slow, or do <code>If, Else If</code> checks which is fast, readable and you're going to need to use some special property/functionality anyways that is unique to this type. If you're looking for a <strong><em>common property</em></strong>, then you need to make a more generic Interface that they all inherit from, at which point you don't need If/Else If anyways.</p> <hr> <p>Second edit: Are you looking for a concept like the below? This allows me to get an item from a list based on its type, as well as to return it based on its generic type.</p> <pre><code> List<IMockEvent> events = new List<IMockEvent>(); public IMockEvent<K> GetMockEvent<T, K>() { return events.First(t => t is T) as IMockEvent<K>; } public void Add(IMockEvent evt) { events.Add(new MockStatusUpdate()); } </code></pre> <p>where classes are defined as</p> <pre><code>public class EMockStatusUpdated : StatusUpdated, IMockEvent<string> { } public interface IMockEvent<T> : IMockEvent { } public interface IMockEvent { } </code></pre>

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