public static void Func1()
{
int a = 32;
object o = a;
Console.WriteLine(a + "," + o);
Console.WriteLine(a.ToString() + "," + o);
var mvt = new MyValueType();
mvt.GetHashCode(); //不会装箱,方法内没有基类实现
mvt.ToString(); //会装箱，方法内有基类实现
mvt.GetType(); //会装箱，该方法由System.Object定义
mvt.Clone(); //不会装箱，值类型实现了接口
var ic = mvt as ICloneable; //会装箱,转化为某个接口
IComparable icc = mvt; //会装箱,转化为某个接口
}
public static bool ExternFunc(this MyValueType objs, object obj)
{
return(false);
}