I have several static fields and need to know what is the best container for them: `class` or `struct`?

```
public class/struct MySharedFields
{
    public static readonly string Field1 = AppConfig.GetValue("Field1");
    public static readonly string Field2 = AppConfig.GetValue("Field2");
    public static readonly string Field3 = AppConfig.GetValue("Field3");
}

```