如何将非托管双精度转换为托管字符串？

class Program
{
    static void Main(string[] args)
    {
        double number = -100.123456789012345678;

        // 将非托管双精度转换为托管字符串
        string str = BinaryReader.GetStringFromStream<double>(new MemoryStream(BitConverter.GetBytes(number)));

        Console.WriteLine(str);
    }
}

class Program
{
    static void Main(string[] args)
    {
        double number = -100.123456789012345678;

        // 反序列化非托管双精度
        unsafe {
            byte[] bytes = BitConverter.GetBytes(number);
            char* charsPointer = stackalloc char[](bytes.Length) ;
            char* bytesPrt = (char*)bytesPointer ;
            for (int i = 0; i< bytes.Length; i++) {
                bytesPrt [i] = chars[bytes[i]];
            }
            double ans = CharConverter.StringToDoubleUsingStringBuilder(charsPointer);
            Console.WriteLine(ans);
        }