1. IsAssignableFrom实例方法 判断一个类或者接口是否继承自另一个指定的类或者接口。
public interface IAnimal { }
public interface IDog : IAnimal { }
public class Dog : IDog { }
public class Cate...
1. IsAssignableFrom实例方法 判断一个类或者接口是否继承自另一个指定的类或者接口。
public interface IAnimal { }
public interface IDog : IAnimal { }
public class Dog : IDog { }
public class Cate...
problem description
euler is a well-known matematician, and, among many other things, he discovered that the formulan^{2} + n + 41n2+n+41 produces a prime for 0 ≤ n < 400≤n&l...