C# console app to display solid square with asterisk (*)

Question

If my input n=4 then it should display 4 dots in square shape as follows, 

* *

* *

if n=5 we cant display square with 5  asterisk mark , it should display square with maximun dots(*) here four. 

 

if n=9 then, 

* * *

* * *  

* * * 

 

again for n=10 it should display the same. Any hints