public void GetDropdown()
        {
            var examples = new List <ExampleEntity>
            {
                new ExampleEntity("Example 1"),
                new ExampleEntity("Example 2"),
                new ExampleEntity("Example 3"),
            };

            var mockSet = ContextMock.CreateMockForDbSet <ExampleEntity>()
                          .SetupForQueryOn(examples);

            var mockContext = ContextMock.CreateMockForDbContext(mockSet);

            var service = new ExampleEntityService(mockContext.Object, null);

            var result = service.GetDropdown();
        }