How do I read 64-bit IEEE Standard 754 double-precision numbers from binary data?

Question

I have a stream of data which consists of 64-bit IEEE standard 754 floating point numbers. How would I read these as doubles in using C#? Is there a way to convert a long/ulong into a double?

Answer 1

BitConverter.Int64BitsToDouble method is specifically designed to do this. Alternatively, you can use a BinaryReader on top of the stream and take double values directly with its ReadDouble method.

double doubleValue = BitConverter.Int64BitsToDouble(longValue);