How to encrypt/decrypt fields/objects in appsettings.json asp.net core

Question

I want to encrypt the connection string in appsetings.json and decrypt before passing it to options.UseSqlServer(Configuration["Database:Connection"])) in ConfigureServices method. Unfortunately there is not much about this on internet about asp.net core. The connection string looks like the following:

    "Database": {
    "Connection": "string"

  }

I might also like to so the same with other setting objects, following is so far I have gone by looking around but I guess I am lost. Any recommendations, highly appreciated. Thank you.

public class CustomConfigProvider : ConfigurationProvider, IConfigurationSource
{
    public CustomConfigProvider()
    {

    }

    public override void Load()
    {
        Data = UnencryptMyConfiguration();
    }

    private IDictionary<string, string> UnencryptMyConfiguration()
    {
        // do whatever you need to do here, for example load the file and unencrypt key by key
        //Like:
        var configValues = new Dictionary<string, string>
        {
            {"Database", "string"}

        };
        return configValues;
    }

    private IDictionary<string, string> CreateAndSaveDefaultValues(IDictionary<string, string> defaultDictionary)
    {
        var configValues = new Dictionary<string, string>
        {
            {"Database", "string"},

        };
        return configValues;
    }
    public IConfigurationProvider Build(IConfigurationBuilder builder)
    {
        return new CustomConfigProvider();
    }
}