public void When_Mapping_With_Conversion_Then_Maps()
        {
            // Arrange
            var sut = new Mapper();
            sut.BuildClassMap<ConversionFrom, ConversionTo>();
            sut.BuildConversion<string, int>().Explictly(x => x.Count());
            var from = new ConversionFrom {Age = "Twelve"};
            var to = new ConversionTo {Age = 6};

            // Act
            sut.Merge(from, to);

            // Assert
            Assert.AreEqual(from.Age.Count(), to.Age);
        }