The error message you encountered indicates that the required assembly 'System.Data.SQLite' with a specific version and public key token could not be found or loaded. This issue commonly occurs when the required assembly is not present in the application's runtime environment.
To resolve this issue, you can take the following steps:
Make sure you have installed the correct version of 'System.Data.SQLite' on your system. You can download the SQLite ADO.NET provider from the official SQLite website (https://www.sqlite.org/download.html). Make sure to download the appropriate version that matches the version mentioned in the error message (1.0.117.0).
If you have already installed 'System.Data.SQLite' but are still encountering the issue, verify that the assembly is correctly referenced in your project:
a. In Visual Studio, right-click on your project in the Solution Explorer and select "Manage NuGet Packages."
b. In the NuGet Package Manager, go to the "Installed" tab and search for 'System.Data.SQLite'. Make sure it is listed as an installed package.
c. If it is not listed, click on the "Browse" tab and search for 'System.Data.SQLite'. Install the correct version that matches the one specified in the error message (1.0.117.0).
If the assembly is already installed and referenced correctly but you are still encountering the issue, ensure that the assembly is copied to the output directory of your project:
a. Right-click on the 'System.Data.SQLite' assembly in the References section of your project.
b. In the Properties window, set "Copy Local" to "True". This will ensure that the assembly is copied to the output directory when the project is built.
If none of the above steps resolve the issue, try cleaning and rebuilding your project to ensure that all dependencies are properly resolved and copied to the output directory.
By following these steps, you should be able to resolve the 'System.Data.SQLite' assembly loading issue.