Could not load file or assembly System.Data.SqlClient

 hii alex-1337  

The error message you're encountering indicates that the system is unable to find the specified version of the 'System.Data.SqlClient' assembly. The version number mentioned in the error message, 'Version=0.0.0.0', typically appears when the system is unable to determine the correct version of the assembly.

In .NET, when a referenced assembly is not explicitly specified with a version number, the runtime attempts to load the assembly with the version defined in the application's configuration file or with the latest version available in the Global Assembly Cache (GAC). However, if it fails to locate the assembly with the specified version, it falls back to the default version number '0.0.0.0'.

To resolve this issue, you can try the following steps:

1. Make sure that the 'System.Data.SqlClient' assembly is present in your project's output directory or in a location where it can be discovered by the runtime. If the assembly is missing, you might need to add it as a reference to your project.

2. Check if you have any configuration files in your project (e.g., 'app.config' or 'web.config') that specify a specific version of the 'System.Data.SqlClient' assembly. Ensure that the version specified in the configuration file matches the version of the assembly you have referenced.

3. Verify that the 'System.Data.SqlClient' assembly version you referenced (4.6.1.3) is compatible with .NET Core and the .NET 6 version you're using. While the assembly might have worked in .NET WebForms, there could be compatibility issues when using it in .NET Core. Consider using a compatible alternative or updating the assembly to a version specifically designed for .NET Core.

4. If you're using a NuGet package to reference 'System.Data.SqlClient', ensure that you have the correct version installed. Try updating the package to the latest version compatible with .NET 6.

By following these steps, you should be able to resolve this.