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I recently read the following overflow post: Hidden Features of C# One of the features pointed out was the arglist. Why would one choose this or the alternatives as a means of using a variable length argument list to a method? Also, note that I would probably not use this kind of construct in my code unless a corner case warranted doing so. This is more of a question of semantics than whether it is even practical or prudent to even use variable length arguments. So does anyone know which is better and why? [Test] public void CanHandleVariableLengthArgs() { TakeVariableLengthArgs(__arglist(new StringBuilder(), 12)); object[] arr = { new StringBuilder() }; TakeVariableLengthArgs2(arr); TakeVariableLengthArgs3( new Dictionary<string, object> { { "key", new StringBuilder() } }); } public void TakeVariableLengthArgs(__arglist) { var args = new ArgIterator(__arglist); var a = (StringBuilder)TypedReference.ToObject(args.GetNextArg()); a.Append(1); } public void TakeVariableLengthArgs2(params object[] args) { var a = (StringBuilder)args[0]; a.Append(1); } public void TakeVariableLengthArgs3(Dictionary<string, object> args) { var a = (StringBuilder)args["StringBuilder"]; a.Append(1); }

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