请考虑以下代码:
class Program
{
static void Main(string[] args)
{
var a = new A();
var b = new B();
Print(a);
Print(b);
Console.WriteLine(b.Hello);
Console.ReadLine();
}
static void Print<T>(T t) where T : A
{
Console.WriteLine(typeof(T));
Console.WriteLine(t.GetType());
Console.WriteLine(t.Hello);
}
}
public class A
{
public string Hello { get { return "HelloA"; } }
}
public class B : A
{
public new string Hello { get { return "HelloB"; } }
}
Run Code Online (Sandbox Code Playgroud)
我得到的输出(.NET FW 4.5)