Your code, Your Plugins - Simple Tab to expose custom configuration settings

global.asax

private void LoadConfiguration()
{
    var connectionString = ConfigurationManager.ConnectionStrings["MusicStoreEntities"];
    var factory = DbProviderFactories.GetFactory(connectionString.ProviderName);
    using (var connection = factory.CreateConnection())
    {
        connection.ConnectionString = connectionString.ConnectionString;
        connection.Open();

        MvcMusicStore.Framework.Configuration.Current = connection.Query<ConfigurationModel>("SELECT * FROM Configuration").First(); 
    }
}

protected void Application_Start()
{
    //...
    LoadConfiguration();
    //...
}

SystemConfiguration.cs

public static class Configuration
{
    public static ConfigurationModel Current { get; set; }
}

public class ConfigurationModel
{
    public string Currency { get; set; }
    
    public double TaxRate { get; set; }
    
    public int DefaultCategory { get; set; }

    public double MarkupRate { get; set; }
}

TabConfiguration.cs

public class TabConfiguration : AspNetTab 
{
    public override string Name
    {
        get { return "Setup"; }
    }

    public override object GetData(Glimpse.Core.Extensibility.ITabContext context)
    {
        return MvcMusicStore.Framework.Configuration.Current;
    }
}