Returns a double-precision floating point number converted from eight bytes at a specified position in a byte array.
A double precision floating point number formed by eight bytes beginning at startIndex.
The BitConverter.ToDouble(Byte[], int) method converts the bytes from index startIndex to startIndex + 7 to a double value. The order of bytes in the array must reflect the endianness of the computer system's architecture; for more information, see the Remarks section of the BitConverter class topic.