Visual studio intelli-sense box is used to speed up the coding process and reduce the typo. This suggestion box provided the description of functions and parameter details. See the below screen shot for some sample about visual studio intellisens box
To display intellisense box press Ctrl + Space button
In the above screen shows the intellisense box with function and parameter details as well, this would help for developer to speed up development.
Above screen shows the complete parameter with description details. Use up or down key to display details about overloaded functions. By default intellisense options are enabled in visual studio tool.