/*
	FactoryCollection class
*/

public class FactoryCollection<T> where T : BusinessData
{
        public void AddFactory<T>() where T : BusinessData
        {
            string name = typeof(T).Name;

            Factory<T> factory = new Factory<T>(_connection, name);
            Factories.Add(name, factory);
        }
}

/*
	The call
*/

Factories = new FactoryCollection<BusinessData>(DatabaseConnection);
Factories.AddFactory<Customer>();

/*
	The error
*/

The best overloaded method match for 'System.Collections.Generic.Dictionary<string,Factory<T>>.Add(string, Factory<T>)' has some invalid arguments