Question: can I use extension methods?

[kasimier-vireq]

I tried to define an extension methods but I'm getting the following error (German; meaning that extension methods need to be defined at top-level, but this is a nested class):

"error CS1109: Die Erweiterungsmethoden müssen in statischen Klassen auf oberster Ebene definiert werden. "Extensions" ist eine geschachtelte Klasse."

[seesharper]

It means that your extension methods must be top-level methods.

Example.

public static string GetFirstFiveCharacters(this string value)
{
    return value[..5];
}

[kasimier-vireq]

Yes, but the script thingy wraps all top-level definitions implicitly:

[kasimier-vireq]

Ah, now I get what you meant. The static extension class must be omitted. Great, thanks!