How would I call a method with the below header on a thread?

    public void ReadObjectAsync<T>(string filename)
    {
        // Can't use T in a delegate, moved it to a parameter.
        ThreadStart ts = delegate() { ReadObjectAcync(filename, typeof(T)); };
        Thread th = new Thread(ts);
        th.IsBackground = true;
        th.Start();
    }

    private void ReadObjectAcync(string filename, Type t)
    {
        // HOW?
    }

    public T ReadObject<T>(string filename)
    {
        // Deserializes a file to a type.
    }