Functional.Maybe (nuget): Option types for C# with LINQ support and rich fluent syntax for many popular uses:  		var maybeOne = "one".ToMaybe(); 		Maybe<string> maybeAnother;  		var maybeBoth =  			from one in maybeOne 			from another in maybeAnother 			select one + another;  		maybeBoth.Match( 			both => Console.WriteLine("Result is: {0}", both),  			@else: () => Console.WriteLine("Result is Nothing, as one of the inputs was Nothing") 		);
Keywords: option|maybe|linq|fluent|functional