public void Test_SimpleHM_Delete() { SimpleHashMap <string, int> hm = new SimpleHashMap <string, int>(5); hm.Insert("Vish", 150); hm.Insert("Renessa", 100); hm.Insert("Johnny", 30); hm.Insert("Albert", 500); hm.Insert("Niam", 35); hm.Delete("Niam"); Assert.ThrowsException <IndexOutOfRangeException>(() => { var value = hm["Niam"]; }); //exits if key not found hm.Delete("David"); }