在将代码应用到实例：
Dog dog = new Dog();
PropertyInfo propertyInfo = dog.GetType().GetProperty(nameof(dog.Name));
//反射操作
propertyInfo.SetValue(dog, "WLJ");
String result = propertyInfo.GetValue(dog) as String;
Console.WriteLine(result);
//表达式树的操作
Property property = new Property(propertyInfo);
property.SetValue(dog, "WLJ2");
String result2 = propertyInfo.GetValue(dog) as String;
Console.WriteLine(result2);
发现其实现的目的与反射一致，但效率却有明显的提高。
以下测试以下他们两之间的效率。测试代码如下：
Student student = new Student();
PropertyInfo propertyInfo = student.GetType().GetProperty(nameof(student.Name));
Property ExpProperty = new Property(propertyInfo);
Int32 loopCount = 1000000;
CodeTimer.Initialize(); //测试环境初始化
//下面该方法个执行1000000次
CodeTimer.Time("基础反射", loopCount, () => {
propertyInfo.SetValue(student, "Fode",null);
});
CodeTimer.Time("lambda表达式树", loopCount, () => {
ExpProperty.SetValue(student, "Fode");
});
CodeTimer.Time("直接赋值", loopCount, () => {
student.Name = "Fode";
});
Console.ReadKey();
其.Net4.0环境下运行结果如下：
.Net Core环境下运行结果：
