using System;
using System.Collections.Generic;
using System.IO;

public class Test
{
	public static void Main()
	{
		List<INonGenericWrapper> wrappers = new List<INonGenericWrapper>();
		wrappers.Add(new Wrapper<object>());
		wrappers.Add(new Wrapper<string>());
		wrappers.Add(new Wrapper<int>());
		var visitor = new SerializationVisitor();//Create the operation you need to apply
		foreach (var wrapper in wrappers)
		{
		    wrapper.Accept(visitor);
		}
	}
}

public class Matrix<T>
{
    public T Obj { get; set; }
}

public interface INonGenericWrapper
{
    void Wrap();
    void Accept(IVisitor visitor);
}

public class Wrapper<T> : INonGenericWrapper
{
    public Matrix<T> Matrix { get; private set; }

    public void Wrap()
    {
        //Your domain specific method
    }

    public void Accept(IVisitor visitor)
    {
        visitor.Visit(this);
    }
}

public interface IVisitor
{
    void Visit<T>(T element);
}

public class SerializationVisitor : IVisitor
{
    public void Visit<T>(T element)
    {
        new Serializer<T>().Serialize(element);
    }
}

public class Serializer<T>
{
    public Stream Serialize(T objectToSerialize)
    {
        Console.WriteLine("Serializing {0}", objectToSerialize);
        //Your serialization logic here
        return null;
    }
}