Is Power of 2? (C#)

 /// <summary>

 /// Checks if an integer is power of 2

 /// </summary>

 /// <param name="i">An int number to check</param>

 /// <returns>true if i is power of 2, false if otherwise</returns>

 public static bool IsPower2(int i)

 {

     return (i != 0) && ((i & -i) == i);

 }