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    <p><strong>As I was entering this question, the answers came to me, so I leave this question answered as a guide to others.</strong></p> <p>I have a function such as </p> <pre><code>T Func&lt;T&gt;(string val) {} </code></pre> <p>Inside this function I do various processing, one item of which is to convert the val to a T.</p> <p>I have another function which I use for this purpose </p> <pre><code>T ChangeType&lt;T&gt;(this object value) </code></pre> <p>This function is mainly a wrapper around Convert.ChangeType with some additional processing, to handle things that Convert.ChangeType can't do out of the box (stolen from stackoverflow elsewhere)</p> <p>Everything works great for most types, but is some cases T is a List and val is then a comma separated list of values.</p> <p>I can correctly determine if T is a List via</p> <pre><code>if (returnType.IsGenericType &amp;&amp; returnType.GetGenericTypeDefinition() == typeof(List&lt;&gt;)) </code></pre> <p>and then I can instantiate the appropriate list return type as follows</p> <pre><code>T list = (T)Activator.CreateInstance(returnType); </code></pre> <p>Now, I need to call my ChangeType on each split value from the string, and add them to the list. </p> <pre><code>var method = typeof (XmlUtil).GetMethod("ChangeType", new [] {typeof(object)}); var genericMethod = method.MakeGenericMethod(subType); var convertedItem = genericMethod.Invoke(null, new [] {item}); var subType = returnType.GetGenericArguments()[0]; </code></pre> <p>All good so far. Now I have a </p> <pre><code>dynamic list; //instantiated with a List&lt;TT&gt; var convertedItem; // which is typed as an object, instantiated with a type TT. </code></pre> <p>How do I call </p> <pre><code>list.Add(convertedItem); </code></pre> <p>the dynamic will handle the fact that I don't have a known interface for the list, but at runtime I get an error because I am trying to add an object to a list, even though the object is actually of type T as instantiated. </p> <p>The ultimate answer, is to cast the List as a non-generic IList, where you can then add object.</p> <pre><code>System.Collections.IList list2; list2 = (System.Collections.IList) list; list2.Add(convertedItem); </code></pre>
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    1. POHow to convert comma delimited string to a List<T> where T is unknown until runtime
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    1. USJason Coyne
    1. USJason Coyne
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    1. POHow to convert comma delimited string to a List<T> where T is unknown until runtime
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    1. COPlease, separate answer and question
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      1. USSergey Berezovskiy
    2. COI have split them as requested
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