Writing one bit to a binary using BinaryWriter

Question

I want to write one bit to a binary file.

using (FileStream fileStream = new FileStream(@"myfile.bin", FileMode.Create))
using (BinaryWriter binaryWriter = new BinaryWriter(fileStream))
{
    binaryWriter.Write((bool)10);
}

Something like binaryWriter.Write((bit)1);
When I use binaryWriter.Write((bool)1), the file has one byte, but I want to write one bit. Is it possible?

Answer 1

You cannot save only 1 bit in a file. Almost all modern file systems and devices store data in 8-bit segments, aka bytes or octets.

If you want to save a bit in a file, save either 1 or 0 as a byte (00000001 or 00000000).

Answer 2

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Answer 3

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Answer 4

Perhaps you could do this by reading / modifying / writing. Why do you want to do this? Whatever it is, find another way, put the bits in bytes, read / write logical bytes and convert them back to bits, use ASCII '0' and '1' - use something other than reading and writing one bit at a time .