可以使用AutoFixture的Customize()方法，为该类型单独定制Fixture，从而解决该问题。具体代码示例如下：

public class TestClass { public string Name { get; set; } public int Age { get; set; }

public TestClass(string name, int age)
{
    Name = name;
    Age = age;
}

}

[TestMethod] public void TestCustomizedAutoFixture() { var fixture = new Fixture().Customize(new MultipleParameterConstructorCustomization()); var testClass = fixture.Create();

Assert.IsNull(testClass.Name);
Assert.AreEqual(0, testClass.Age);

}

public class MultipleParameterConstructorCustomization : ICustomization { public void Customize(IFixture fixture) { fixture.Customizations.Add(new MultipleParameterConstructorSpecimenBuilder()); } }

public class MultipleParameterConstructorSpecimenBuilder : ISpecimenBuilder { public object Create(object request, ISpecimenContext context) { var type = request as Type; if (type == null || type != typeof(T)) { return new NoSpecimen(); }

    var ctors = type.GetConstructors().Where(x => x.GetParameters().Count() > 1);
    if (!ctors.Any())
    {
        return new NoSpecimen();
    }

    return Activator.CreateInstance(type, ctors.First().GetParameters().Select(x => context.Resolve(x.ParameterType)).ToArray());
}

}

其中，MultipleParameterConstructorCustomization类为自定义类，用于定制fixture，重载ICustomization接口的Customize方法。MultipleParameterConstructorSpecimenBuilder类为自定义类，用于指定实例创建方式，重载ISpecimenBuilder接口的Create方法。对于只有一个构造函数但所有参数都需要输入的类型，可以通过这种方式自定义AutoFixture，来实现正常使用Without()和其他方法。