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Lets say I have this class class Child { public string FirstName { get; set; } public string LastName { get; set; } } class Container { public List<Child> { get; set; } } I'm working on a deserializer of sorts and I want to be able to create and populate the Child list from the data retrieved. I've gotten this far (I've cut out a lot of handling for other types for this example so its unnecessarily "iffy" but bear with me): var props = typeof(Container).GetProperties(); foreach (var prop in props) { var type = prop.PropertyType; var name = prop.Name; if (type.IsGenericType) { var t = type.GetGenericArguments()[0]; if (type == typeof(List<>)) { var list = Activator.CreateInstance(type); var elements = GetElements(); foreach (var element in elements) { var item = Activator.CreateInstance(t); Map(item, element); // ??? how do I do list.Add(item) here? } prop.SetValue(x, list, null); // x is an instance of Container } } } I can't figure out how to cast list to essentially List<t.GetType()> so I can access the add method and add the item.

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