Design and Architecture

public abstract class LibSetting
{
     public int MaxCount { get; set; }

     public abstract void SetCount();
}

public class MySetting : LibSetting
{
    public override void SetCount()
    {
        MaxCount = 100;
    }
}

public int ShowCount()
{
       Assembly asm = Assembly.GetCallingAssembly();

       IEnumerable<Type> types = asm.GetTypes().Where(t => t.IsClass && t.BaseType == typeof(LibSetting));

       LibSetting setting =(LibSetting) asm.CreateInstance(types.First().FullName);

       setting.SetCount();

       return setting.MaxCount;
}

          [UI]

------Controllers------
   
     [Business Logic]

------Datacontext------

MarketingDB | ManagementDB

/// <summary>
/// Gets the employee.
/// </summary>
/// <param name="emailAddress">The email address.</param>
/// <returns></returns>
public static employee GetEmployee(string emailAddress)
{
    using (EmployeeDBDataContext myDbContext = new EmployeeDBDataContext())
    {
        employee empRecord = myDbContext.employees.Where(aRec => aRec.emailAddress == emailAddress).ToArray().SingleOrDefault();
        return empRecord;
    }
}