Finding out if a big number is a perfect square numbers using C# : <p>Is there a fast and simple way to write a program in C#, that finds out if a big (something like 25 digits big) number is a perfect square or not?</p>

<p>Perfect squares are the numbers: 0^2=0,1^2=1,2^2=4,3^2=9,4^2=16,...</p>
