Create List<> from runtime type

Question

I am looking to create a List, where the type of T is several unrelated classes (with the same constructor arguments) that I know through reflection.

    DataBase = new ArrayList();
    foreach (Type T in Types)
    {
        DataBase.Add(new List<T>);
    }

Unfortunately, Visual Studio says that 'The type or namespace T could not be found'. Is there some way I can implement this, or cast a List to type T? Thanks, Peter

Answer 1

You can use reflection:

List<object> database = new List<object>();
foreach (Type t in Types)
{
   var listType = typeof(List<>).MakeGenericType(t);
   database.Add(Activator.CreateInstance(listType));
}