How to improve this fluent interface? [closed]

I am working on a fluent interface for exception handling.
Here’s how it looks :

On<NullReferenceException>()
                    .First.LogTo("errors")
                    .Then.TranslateTo("null object");

            On<FileNotFoundException>()
                    .First.Translate(excpetion => excpetion.Message)
                    .Then.LogTo("errors");

            On<InvalidOperationException>()
                    .If(excpetion => excpetion.Message.Contains("This is a test"))
                    .First.DoSomethingElse(exception => Console.WriteLine(exception.Message));

            On<ArgumentException>().Ignore();

Do you think it’s as fluent as it should be ? can I make it better ? any suggestions ?

I would remove the First and Then methods and just execute actions in the order they are declared.

On<InvalidOperationException>()
                .If(excpetion => excpetion.Message.Contains("This is a test"))
                .First.DoSomethingElse(exception => Console.WriteLine(exception.Message));

Is a bit confusing to me regarding scoping of the individual branch. If you want to do more than one thing after the if statement, how are you supposed to do it? I assume that your code will call the lambda in DoSomethingElse() if the condition is true. If that was followed by .Then.LogTo("errors");, would the execution of the LogTo also be conditional based on the If?

Perhaps, if you can make it clearer what is done in each specific case it would be easier to read this scoping. Say for instance,

On<InvalidOperationException>()
                .If(excpetion => excpetion.Message.Contains("This is a test"), whentrue => {
                   whentrue.SomethingElse(exception => Console.WriteLine(exception.Message))
                     .LogTo("console");
                },
                otherwise => otherwise.LogTo("eventLog");