Invoke、InvokeMember提示“调用的目标发生了异常”

void fn(int n)
{
if (n >= 10)
return;
throw new ArgumentException("参数必须大于10");
}

Type type = typeof(Program);
object instance = Activator.CreateInstance(type);
MethodInfo mi = type.GetMethod("fn", BindingFlags.NonPublic | BindingFlags.Instance);
try
{
mi.Invoke(instance, new object[] { null });
}
catch(TargetInvocationException targetEx)
{
if (targetEx.InnerException != null)
{
throw targetEx.InnerException;
}
}