Unit Testing | Unsupported expression: ht => ht.LoadAll<ReasonType>()Non-overridable members

c++
public List<ReasonType> GetAll()
        {
            return new List<ReasonType>(_hibernate.LoadAll<ReasonType>());
        }

c++
public List<ReasonType> GetAll()
        {
            return new List<ReasonType>(_hibernate.LoadAll<ReasonType>());
        }

c++
 [Test]
        public void GetAll_ReasonType()
        {
            // Arrange
            var ReasonTypeList = new List<ReasonType>
            {
                new ReasonType()
                {
                    TypeId = "TestOne",
                    Description = "Testing Reason 1"
                },
                new ReasonType()
                {
                    TypeId = "TestTwo",
                    Description = "Testing Reason 2"
                }
            };

            var sessionFactoryMock = new Mock<ISessionFactory>();
            var sessionMock = new Mock<ISession>();
            var hibernateTemplateMock = new Mock<HibernateTemplate>(sessionFactoryMock.Object);
            hibernateTemplateMock.Setup(ht => ht.LoadAll<ReasonType>()).Returns(ReasonTypeList);

            var ReasonTypePersistenceHibernate = new ReasonTypePersistenceHibernate(hibernateTemplateMock.Object);

            // Act
            var result = ReasonTypePersistenceHibernate.GetAll();

            // Assert
            Assert.IsNotNull(result);
            Assert.AreEqual(ReasonTypeList.Count, result.Count);
            Assert.AreEqual(ReasonTypeList[0].TypeId, result[0].TypeId);
            Assert.AreEqual(ReasonTypeList[1].TypeId, result[1].TypeId);

            // Verify that LoadAll was called exactly once
            hibernateTemplateMock.Verify(ht => ht.LoadAll<ReasonType>(), Times.Once);
        }

c++
 [Test]
        public void GetAll_ReasonType()
        {
            // Arrange
            var ReasonTypeList = new List<ReasonType>
            {
                new ReasonType()
                {
                    TypeId = "TestOne",
                    Description = "Testing Reason 1"
                },
                new ReasonType()
                {
                    TypeId = "TestTwo",
                    Description = "Testing Reason 2"
                }
            };

            var sessionFactoryMock = new Mock<ISessionFactory>();
            var sessionMock = new Mock<ISession>();
            var hibernateTemplateMock = new Mock<HibernateTemplate>(sessionFactoryMock.Object);
            hibernateTemplateMock.Setup(ht => ht.LoadAll<ReasonType>()).Returns(ReasonTypeList);

            var ReasonTypePersistenceHibernate = new ReasonTypePersistenceHibernate(hibernateTemplateMock.Object);

            // Act
            var result = ReasonTypePersistenceHibernate.GetAll();

            // Assert
            Assert.IsNotNull(result);
            Assert.AreEqual(ReasonTypeList.Count, result.Count);
            Assert.AreEqual(ReasonTypeList[0].TypeId, result[0].TypeId);
            Assert.AreEqual(ReasonTypeList[1].TypeId, result[1].TypeId);

            // Verify that LoadAll was called exactly once
            hibernateTemplateMock.Verify(ht => ht.LoadAll<ReasonType>(), Times.Once);
        }