dotnet: Arithmetic operation resulted in an overflow

[matt454357]

SwModelReaderCore returns an error when attempting to get preview image. Every time the Rol() method is called, I get System.OverflowException. It happens at this line:

return (byte)((bits << shift) | (bits >> (8 - shift)));

[schwitters]

sorry,there is an issue: the file decoding is done wrong and i've yet no idea how to do it right. Solidworks provides no informations about internals. Feel free to dig into the solidworks fileformat and send a patch.