4 public static int Main() {
5 Console.WriteLine("test");
6 TestClass tst = new TestClass();
8 TestInterface ti = (TestInterface)tst;
13 public interface TestInterface {
14 string test(string name);
17 public class TestClass: TestInterface {
18 public string test(string name) {
19 Console.WriteLine("test2");
20 return name + " testar";