using System.Buffers.Binary;

using System;

​

short[] values = {16400, -2098, -9962, -30933};

byte[] buf = new byte[values.Length * sizeof(short)];

for (int i = 0; i < values.Length; i++)

{

    BinaryPrimitives.WriteInt16BigEndian(buf.AsSpan(i * sizeof(short)), values[i]);

}

double result = BinaryPrimitives.ReadDoubleBigEndian(buf);

Console.WriteLine(result);