反射创建对象，创建泛型集合，创建泛型字典

object obj = new object();

//反射创建普通对象
object o = Activator.CreateInstance(obj.GetType());

//反射创建泛型集合
Type generic = typeof(List<>);
Type[] typeArgs1 = { obj.GetType() };
generic=generic.MakeGenericType(typeArgs1);
var list=Activator.CreateInstance (generic) as IList;

//反射创建泛型字典
generic = typeof(Dictionary<,>);
Type[] typeArgs2 = { typeof(string), obj.GetType() };
generic = generic.MakeGenericType(typeArgs2);
var dic = Activator.CreateInstance(generic) as IDictionary;