Question

I have this code that has the [Ent] inside the using

 public static void Retion()
        {

            using (Ent entitiesContext = new Ent())
                {...}
         {

I need to pass the [Ent] dynamically, like this:

 public static void Retion(Type ds)
            {

                using (ds entitiesContext = new ds())
                    {...}
             {

This of course does not work. How to I change this so that I can pass it dynamically?

Answer 1

Perhaps via generics:

public static void Retion<T>() where T : IDisposable, new()
{
    using (T entitiesContext = new T())
    {...}

then Retion<Ent>()

Note that to do anything useful with entitiesContext, you’ll probably also need some base–class constraint, i.e.

public static void Retion<T>() where T : DataContext, new()
{
    using (T entitiesContext = new T())
    {...}

Of course, that then isn’t hugely different to:

public static void Retion(Type type)
{
    using (DataContext entitiesContext = 
        (DataContext)Activator.CreateInstance(type))
    {...}