Is there a better way to express a parameterless lambda than () =>?

Question

The () seems silly. is there a better way?

For example:

ExternalId.IfNotNullDo(() => ExternalId = ExternalId.Trim());

Answer 1

No, there isn't. Lambda expressions are optimised (in terms of syntax) for the single parameter case.

I know that the C# team feels your pain, and have tried to find an alternative. Whether there ever will be one or not is a different matter.