[Vala] `Gee.List' is not a class, struct, or error code

[fdsdœ Fsfsd <fred_gaudy yahoo fr>]

Hello,

I've got this error message :
Gee.List' is not a class, struct, or error code

with the following code :
void test() {
    Gee.List<string> list = null;
   
    list = new Gee.List<string>();
}

I'm using libgee-0.1..4.

I don't understand where is the problem. Any suggestions?

Thanks you.