Question Reading Text/Binary File

[Smoke]

Im developing a custom app that has to read a file generated from other program, actually, the file is pretty much a mail message,
which contains the subject, to, from, body, etc etc and also the attaches and its binary data.

My problem is that i cannot seems to understand how can i read the "binary" data from the file at the specific possition, or even
worst how to know where to start read.

As an example, the files contains something like this...

..........
Content-Type: Multipart
Content-Length: 37832

Content-Type: Text
Encoding-Type: ISO8859.1
Content-Length: 0
Content-Type: Binary
Content-Name: angiediaz705.jpg
Content-Abstract: [No Description]
Content-Length: 37466

ÿØÿà JFIF


H H ÿÛ C  
..........

I do know that i have to read 37466 bytes from the file starting at the next line of the ContentLenght but if i open the file in a
streamreader the data is not bytes so i cannot read it whell, and if i open it as binary i dont know how to seek to a
"Contet-Length" position where the text is...

Anyone has any idea how to handle this or where i can look for more information? can i read that data as chars and then convert it
to bytes without loosing the "binary" property at all?

Thanks for the help...