public void UnregisterClassNonMapGenericTest()
        {
            var config = new CsvHelper.Configuration.Configuration();

            Assert.IsNull(config.Maps[typeof(TestClass)]);
            config.RegisterClassMap(typeof(TestClassMappings));
            Assert.IsNotNull(config.Maps[typeof(TestClass)]);

            config.UnregisterClassMap(typeof(TestClassMappings));
            Assert.IsNull(config.Maps[typeof(TestClass)]);
        }