使用moq返回null的模拟方法抛出NullReferenceException

var mockObject = new Mock<IFoo>();
mockObject.Setup(foo => foo.Method()).Throws<NullReferenceException>();

// 调用模拟方法
var result = mockObject.Object.Method(); // 这里会抛出NullReferenceException异常

var mockObject = new Mock<IFoo>();
mockObject.Setup(foo => foo.Method()).Returns(null).Callback(() => throw new NullReferenceException());

// 调用模拟方法
var result = mockObject.Object.Method(); // 这里会抛出NullReferenceException异常