C# App: Getting extra bytes using BinaryWriter

[ShapeMan]

I'm trying to export data to a binary file. I have imported the data from a binary file using BinaryReader and everything works as I would have expected. The data after importing is a variety of mainly numerical types. I export it using BinaryWriter exactly the same way but get a much larger binary file. My research tells me that the Write method in BinaryWriter prefixes the bytes with the length.

How can I avoid this? I'm quite new to this so if you can idiot proof any answers, that would be great!

Here is an example of the code I have written to output the data:

System.IO.FileStream FS = new System.IO.FileStream(FileName, System.IO.FileMode.Create);
System.IO.BinaryWriter BW = new System.IO.BinaryWriter(FS);

for (int ii = 0; ii < 32; ii++)
{
BW.Write(pMM.Header.bB1_32[ii]);
}

Do I perhaps need to convert the data into bytes and then write it using the FileStream? If so, how do I do this?

[Plater]

Do I perhaps need to convert the data into bytes and then write it using the FileStream? If so, how do I do this?

I would say that yes that should work. FileStream will write a byte[] so all you have to do is get your data in byte form.

If you read in the entire file using BinaryReader, then writing out the entire file with BinaryWriter should have produced the same file? (I will do a bit of testing when I have time) You aren't doing any up-converting are you? like an int16 to an int32 or int64?