can't i use virtual with the override?
<p>I want to know why I cant we use virtual+override together 
<br />If I want the overridden method to be override again in a sub class, then what will I do ?</p>

<pre><code>class A
{
virtual m1(){"in a"};
}
class B:A
{
virtual override m1()
  {"in b" }
}
class c:B
{
override m1(){"in c"}
}
</code></pre>

<p>Also, please let me know when we say "instance of an object," what does that mean?</p>
