You can view it in View >> Object Browser
.
Apart from this you do not see it anywhere else.
In case you would like to present the "return" information via a tooltip then it is better to put it inside the <summary>
itself as a part of the description.
There are some possibilities to make the <summary>
more readeable when you want to put more text inside, e.g. by using <para>
:
///<summary>
///<para>line1</para>
///<para>line2 (e.g. what a method returns)</para>
///</summary>