<local:MyClasificators x:Key="clList"></local:MyClasificators>
translates to something like:
Resources.Add("clList", new MyClasificators());
That's it, there's no data in your object.
You could create the resource clList
from code, for example in app.xaml.cs:
var countryTable = ... // Get or create table here
var clList = new MyClasificators();
var clList.callMyClassificators(countryTable);
Resources.Add("clList", clList);