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I need to "merge" 2 dynamic objects in C#. All that I've found on stackexchange covered only non-recursive merging. But I am looking to something that does recursive or deep merging, very much the same like jQuery's $.extend(obj1, obj2) function. Upon collision of two members, the following rules should apply: If the types mismatch, an exception must be thrown and merge is aborted. Exception: obj2 Value maybe null, in this case the value & type of obj1 is used. For trivial types (value types + string) obj1 values are always prefered For non-trivial types, the following rules are applied: IEnumerable & IEnumberables<T> are simply merged (maybe .Concat() ? ) IDictionary & IDictionary<TKey,TValue> are merged; obj1 keys have precedence upon collision Expando & Expando[] types must be merged recursively, whereas Expando[] will always have same-type elements only One can assume there are no Expando objects within Collections (IEnumerabe & IDictionary) All other types can be discarded and need not be present in the resulting dynamic object Here is an example of a possible merge: dynamic DefaultConfig = new { BlacklistedDomains = new string[] { "domain1.com" }, ExternalConfigFile = "blacklist.txt", UseSockets = new[] { new { IP = "127.0.0.1", Port = "80"}, new { IP = "127.0.0.2", Port = "8080" } } }; dynamic UserSpecifiedConfig = new { BlacklistedDomain = new string[] { "example1.com" }, ExternalConfigFile = "C:\\my_blacklist.txt" }; var result = Merge (UserSpecifiedConfig, DefaultConfig); // result should now be equal to: var result_equal = new { BlacklistedDomains = new string[] { "domain1.com", "e

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