How to write typical C# one-liners as separate pieces of code?

I’m taking over a Prism-based C# application that contains quite some lambda-ish one-liners, like the following:

using Prism.Interactivity.InteractionRequest;
...
public InteractionRequest<Confirmation> OwnObjectRequest { get; } = new InteractionRequest<Confirmation>();
...
OwnObjectRequest.Raise(confirmation, c => // one-liner
{
    Confirmation conf = (Confirmation)c;
    if (conf.Confirmed)
    {
        DoSomething();
    }
});

I would like to program in a cleaner way, by which I mean that I only want to put one single action on one single line, but I don’t get it done (what’s the signature of some_Method, how to use it in order to define an action, …?)
This is what I have until now:

public ... some_Method(...)
{
    Confirmation conf = (Confirmation)c;
    if (conf.Confirmed)
    {
        DoSomething();
    }
}

Action actionToPerform = new Action(some_Method);
OwnObjectRequest.Raise(confirmation, actionToPerform);

Does anybody know how to write this?

I don’t think there’s any technical advantage in writing such a one-liner in multiline format, but it would heavily help me understand how to read, understand and maybe give support for this source code.

>Solution :

I’m not sure if I understood correctly or not, but you can define a separate method or use a lambda expression directly

so for example if you want separate mtehod :

public void HandleConfirmation(Confirmation confirmation)
{
    if (confirmation.Confirmed)
    {
        DoSomething();
    }
}

and then, you can use this method as the action to be raised:

OwnObjectRequest.Raise(confirmation, HandleConfirmation);

or using a lambda expression

OwnObjectRequest.Raise(confirmation, c =>
{
    Confirmation conf = (Confirmation)c;
    if (conf.Confirmed)
    {
        DoSomething();
    }
});