string class disposable method
<pre><code>private void test()
{
    string tst = null;
    try
    {
        tst = "abc";     
    }
    catch (Exception)
    {
        throw;
    }
    finally
    {
        tst = null;           
    }
}
</code></pre>

<p>My query is - Is it meaningful to type <code>tst = null;</code> in the finally block as the string class doesn't have the disposable method ?</p>
