C#算法之判断一个字符串是否是对称字符串

static bool IsSymmetry1(string str)
{
    if (string.IsNullOrEmpty(str) || str.Length == 1)
    {
        return false;
    }
    for (int i = 0; i < str.Length / 2; i++)
    {
        if (str[i] != str[str.Length - 1 - i])
        {
            return false;
        }
    }
    return true;
}
static bool IsSymmetry1(string str)
{
    i