How To Solve Server Error 'CS0246' at .aspx page?

The application is running successfully at the Local Host Server. But when we run it on the web server, the error is showing up.

Server Error in '/' Application.
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0246: The type or namespace name 'MySqlConnection' could not be found (are you missing a using directive or an assembly reference?)

Source Error:

Line 20: public partial class addnewproduct : System.Web.UI.Page
Line 21: {
Line 22: MySqlConnection con = new MySqlConnection(ConfigurationManager.ConnectionStrings["cnog"].ConnectionString);
Line 23: string img_photo = "-1";
Line 24: string img_front = "-1";

Source File: d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\addnewproduct.aspx.cs Line: 22


Show Detailed Compiler Output:

C:\Windows\SysWOW64\inetsrv> "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" /t:library /utf8output /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.DataVisualization\v4.0_4.0.0.0__31bf3856ad364e35\System.Web.DataVisualization.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.DynamicData\v4.0_4.0.0.0__31bf3856ad364e35\System.Web.DynamicData.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.ApplicationServices\v4.0_4.0.0.0__31bf3856ad364e35\System.Web.ApplicationServices.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Activities\v4.0_4.0.0.0__31bf3856ad364e35\System.Activities.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.IdentityModel\v4.0_4.0.0.0__b77a5c561934e089\System.IdentityModel.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_32\System.EnterpriseServices\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.EnterpriseServices.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel\v4.0_4.0.0.0__b77a5c561934e089\System.ServiceModel.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Windows.Forms\v4.0_4.0.0.0__b77a5c561934e089\System.Windows.Forms.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Activation\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Activation.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Xml.Linq\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.Linq.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Activities\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Activities.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.WorkflowServices\v4.0_4.0.0.0__31bf3856ad364e35\System.WorkflowServices.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Runtime.Serialization\v4.0_4.0.0.0__b77a5c561934e089\System.Runtime.Serialization.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_32\System.Web\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Web.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_32\System.Data\v4.0_4.0.0.0__b77a5c561934e089\System.Data.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Web\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Web.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Xml\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.Entity\v4.0_4.0.0.0__b77a5c561934e089\System.Web.Entity.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Data.DataSetExtensions\v4.0_4.0.0.0__b77a5c561934e089\System.Data.DataSetExtensions.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.ComponentModel.DataAnnotations\v4.0_4.0.0.0__31bf3856ad364e35\System.ComponentModel.DataAnnotations.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Microsoft.CSharp\v4.0_4.0.0.0__b03f5f7f11d50a3a\Microsoft.CSharp.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.WebPages.Deployment\v4.0_1.0.0.0__31bf3856ad364e35\System.Web.WebPages.Deployment.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.Extensions\v4.0_4.0.0.0__31bf3856ad364e35\System.Web.Extensions.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Drawing\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Design\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Design.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.WebPages.Deployment\v4.0_2.0.0.0__31bf3856ad364e35\System.Web.WebPages.Deployment.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Management\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Management.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Core\v4.0_4.0.0.0__b77a5c561934e089\System.Core.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.Services\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Web.Services.dll" /out:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.dll" /DEBUG /debug+ /optimize- /win32res:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\mpnekw3u.res" /w:4 /nowarn:1659;1699;1701;612;618 /warnaserror- "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.11.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.12.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.14.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.9.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.5.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.6.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.4.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.3.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.2.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.7.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.1.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.8.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.0.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.13.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9f0ddc1\afb186bc\App_Web_mpnekw3u.10.cs"


Microsoft (R) Visual C# Compiler version 4.0.30319.17929

for Microsoft (R) .NET Framework 4.5
Copyright (C) Microsoft Corporation. All rights reserved.

d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\buzfizlogin.aspx.cs(7,7): error CS0246: The type or namespace name 'MySql' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\Register.aspx.cs(7,7): error CS0246: The type or namespace name 'MySql' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\Register.aspx.cs(13,7): error CS0246: The type or namespace name 'CodeCarvings' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\Register.aspx.cs(16,7): error CS0246: The type or namespace name 'CloudinaryDotNet' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\Register.aspx.cs(17,7): error CS0246: The type or namespace name 'CloudinaryDotNet' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\login.aspx.cs(7,7): error CS0246: The type or namespace name 'MySql' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\addnewproduct.aspx.cs(8,7): error CS0246: The type or namespace name 'MySql' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\addnewproduct.aspx.cs(17,7): error CS0246: The type or namespace name 'CloudinaryDotNet' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\addnewproduct.aspx.cs(18,7): error CS0246: The type or namespace name 'CloudinaryDotNet' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\Vendorsignup.aspx.cs(7,7): error CS0246: The type or namespace name 'MySql' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\Vendorsignup.aspx.cs(14,7): error CS0246: The type or namespace name 'CodeCarvings' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\Vendorsignup.aspx.cs(17,7): error CS0246: The type or namespace name 'CloudinaryDotNet' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\Vendorsignup.aspx.cs(18,7): error CS0246: The type or namespace name 'CloudinaryDotNet' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\Verify_Vendor_Account.aspx.cs(7,7): error CS0246: The type or namespace name 'MySql' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\kvvesregistration.aspx.cs(7,7): error CS0246: The type or namespace name 'MySql' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\kvvesregistration.aspx.cs(16,7): error CS0246: The type or namespace name 'CloudinaryDotNet' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\kvvesregistration.aspx.cs(17,7): error CS0246: The type or namespace name 'CloudinaryDotNet' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\buzfizlogin.aspx.cs(14,5): error CS0246: The type or namespace name 'MySqlConnection' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\Register.aspx.cs(25,5): error CS0246: The type or namespace name 'MySqlConnection' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\login.aspx.cs(12,5): error CS0246: The type or namespace name 'MySqlConnection' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\addnewproduct.aspx.cs(22,5): error CS0246: The type or namespace name 'MySqlConnection' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\Vendorsignup.aspx.cs(21,5): error CS0246: The type or namespace name 'MySqlConnection' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\Verify_Vendor_Account.aspx.cs(13,5): error CS0246: The type or namespace name 'MySqlConnection' could not be found (are you missing a using directive or an assembly reference?)
d:\inetpub\vhosts\buzfiz.com\asp.buzfiz.com\Krishna\kvvesregistration.aspx.cs(21,5): error CS0246: The type or namespace name 'MySqlConnection' could not be found (are you missing a using directive or an assembly reference?)

 

My guess is MySqlConnection is defined in a dll that's not on the production box. The other option is the web.config are registering different namespaces.