LINQ wrapper class around binary DataType

I have a LINQ to SQL class called Data with a column of type Data.Linq.Binary. I want to create a wrapper class that extracts the actual object from the Binary field. I have multiple classes that store information in the Data table. I know by context, as in each class that stores information in the Data table ALWAYS stores the same type. I have a class Something with a method that adds/reads a string to/from the Data table.

class Data // LINQ to SQL generated
{
     System.Data.Linq.Binary Value {get; set;}
     string Name {get; set;}
     int ID {get; set;}
}

class Something
{
   void Add(string s)
   {
      //using (db)
      Data.Value = s.ToBinary(); //Convert the string to a byte[] then to Binary
   }
}

I then want a property that reads from the Binary column:

class Something
{
   string Value
   {
      //using (db)
      get{ return Data.Value.ToString();//Convert to byte[] then to string }
   }
}

This by itself works perfectl开发者_开发问答y fine, but I have multiple classes that do this same interaction. Naturally I want an interface or an abstract class, something like this:

interface Binary<T>
{
   void Add(T t);
   T Value {get;}
}

Here is my problem: In the Value getter I have a linq query that actually returns the LinqToSql Data class with a Linq.Binary Value, but in my interface I have a T Value. How do I cast a linq query to this Binary interface? Something like this, although it doesn't work:

List<Binary<T>> Value
{
   get
   {
        return (from D in db.Data
                select D).Cast<Binary<T>>();
   }
}

Edit: I had the wrong Property at the very end. It should be Value, not Name.

---

Unless you want your Data class to be generic itself, it has to implement Binary<T> for a particular T, i.e. string, so the class declaration looks like this:

class MyDataWrapper : Binary<string> 
{
   ...

In that case the Name implementation looks something like this:

List<Binary<string>> Name
{
   get
   {
        return (from D in db.Data
                select D).Cast<Binary<string>>();
   }
}