Hi Fransisco,
I tested the latest Npgsql driver (2.0.12.0), the issue has been fixed. I was able to connect Npgsql test application from my Windows XP client machine with the PostgreSQL server running on Windows 2003 Server.
Thank you for applying the patch.
On Thu, Feb 24, 2011 at 3:37 PM, Ahmed Shinwari 
<ahmed.shinwari@gmail.com> wrote:
On Sat, Feb 19, 2011 at 11:31 PM, Brar Piening 
<brar@gmx.de> wrote:
On Thu, 17 Feb 2011 07:58:46 -0800 (PST), Ahmed <
ahmed.shinwari@gmail.com> wrote:
 I tried changing that one line to use UTF-8 encoder, but the password packet
 didn't get fixed. It works smoothly if kept in byte array instead of string.
 While "char *buffer" in C can serve as both a string and a buffer of binary bytes, we have "byte[]" as binary buffer and "string" as string in c#.
 This is the reason why we need to use byte[] in all places where libpq uses char* without really caring whether there is a string inside or some opaque bytes. I think changing the AuthenticationSSPI case to use context.Host may break
 the cases Brar's mentioned.
I agree.
For now, Francisco may check in that part which fixes the bug due to encoding. And, address the later issue after further investigation.
 
 Regards,
 Brar