public static void event_with_string_payload()
{
var obj = new Dummy.TestObject();
string received_string = null;
obj.EvtWithStringEvent += (object sender, Dummy.TestObjectEvtWithStringEventArgs e) => {
received_string = e.arg;
};
obj.EmitEventWithString("Some args");
Test.AssertEquals("Some args", received_string);
}