Running modified Dbgrid.exe

Many thanks for your assistance Alexander. I have changed the sample 
Dbgrid.exe to use Npgsql. It compiles ok in monodevelop and with mcs as 
below. However it does not run. Any comments would be appreciated.


linuxpro DbGrid # mcs -r:wx.NET.dll -L /root/CSharp/bin/Debug Dbgrid.cs 
Dbgrid.cs(27) error CS0246: Cannot find type `Point'
Dbgrid.cs(27) error CS0246: Cannot find type `Size'
Dbgrid.cs(57) error CS0246: Cannot find type `Npgsql.NpgsqlConnection'
Dbgrid.cs(58) error CS0246: Cannot find type `Npgsql.NpgsqlDataAdapter'
Dbgrid.cs(69) error CS0246: Cannot find type `Point'
Dbgrid.cs(69) error CS0246: Cannot find type `Size'
Dbgrid.cs(14) error CS0246: The namespace `System.Drawing' can not be found 
(missing assembly reference?)
    Try using -r:System.Drawing
Dbgrid.cs(15) error CS0246: The namespace `System.Data' can not be found 
(missing assembly reference?)
    Try using -r:System.Data
Dbgrid.cs(16) error CS0246: The namespace `Npgsql' can not be found (missing 
assembly reference?)
Compilation failed: 9 error(s), 0 warnings
linuxpro DbGrid # man mcs
linuxpro DbGrid # mcs 
-r:wx.NET.dll,System.Drawing.dll,System.Data.dll,Npgsql.dll 
-L /root/CSharp/bin/Debug Dbgrid.cs
Compilation succeeded

linuxpro DbGrid # ls
AssemblyInfo.cs  CSharp.txt~  Dbgrid.cs   Main.cs     mondrian.png  readme.txt
CSharp.txt	 DbGrid.prjx  Dbgrid.exe  libwx-c.so  premake.lua   wx.NET.dll
linuxpro DbGrid # mono Dbgrid.exe

linuxpro DbGrid # mono Dbgrid.exe
Compat mode: the request from /root/CSharp/DbGrid/wx.NET.dll to load 
System.Drawing was remapped (http://www.go-mono.com/remap.html)
Compat mode: the request from /root/CSharp/DbGrid/wx.NET.dll to load 
System.Data was remapped (http://www.go-mono.com/remap.html)

Unhandled Exception: System.Net.Sockets.SocketException: Connection refused
in <0x000de> System.Net.Sockets.Socket:Connect (System.Net.EndPoint)
in <0x00017> System.Net.Sockets.TcpClient:Connect (System.Net.IPEndPoint)
in <0x001fd> System.Net.Sockets.TcpClient:Connect (string,int)


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