Find The Given Value Is Power Of 2

private void FindPower(int a)
{

    int multiple=1;

    while (multiple < a)
    {
        multiple = multiple * 2;

    }
    if (multiple == a)
    {
        Response.Write("Value is square of 2");
    }
    else
    {
        Response.Write("Value is not square of 2");
    }

}