http://www.codewars.com/kata/566f571ed78037c7b6000036/train/csharp You don't have any idea what is the type of the input object, but you know that it has Length property. (The input can be any type of object that has Length property) So, the GetLengt…
所有表达式都能隐式的转换成dynamic,因为所有的表达式最终都能生成从Object派生出的类型. ; int b = a; //隐式转换错误 int b2 = (int)a; ; int b3 = d1; //可隐式转换 注意: 不要混淆dynamic和var.用var声明局部变量只是一种简化语法,它要求编译器根据表达式推断具体数据类型.var只能在方法内部声明局部变量,而dynamic关键字可用于局部变量.字段.和参数. 表达式不能转换成var,但却能转型为dynamic.必须显式初始…
https://www.newtonsoft.com/json/help/html/T_Newtonsoft_Json_JsonConvert.htm 在使用DeserializeObject函数进行转换的时候,会自动处理,如果和T匹配,就会转换好. 如果类型不匹配,也不会报错的. public class Person { public string Id { get; set; } public string FirstName { get; set; } public string Las…