Untitled

public static string getClass(int sayi){
string whiteClass="denemeBeyaz";
string grayClass="denemeGri";

for (int i = 1; i <= sayi; ++i)
{ 
  if (i % 2 == 0)
    return whiteClass ;
      else
        return grayClass ; 
}

return "";

}

Console.WriteLine(getClass(3));