public void BindRequired_SetsBehavior() {
            // Act
            BindingBehaviorAttribute attr = new BindRequiredAttribute();

            // Assert
            Assert.AreEqual(BindingBehavior.Required, attr.Behavior);
        }
        public void TypeId_ReturnsSameValue() {
            // Arrange
            BindNeverAttribute neverAttr = new BindNeverAttribute();
            BindRequiredAttribute requiredAttr = new BindRequiredAttribute();

            // Act & assert
            Assert.AreSame(neverAttr.TypeId, requiredAttr.TypeId);
        }