Problem mapping csv to nested lists

[Vejahatf]

Hi,
I have a question related to another inquiry with some difference and I cannot figure it out myself. my problem goes one more layer deeper as follows:

public class MyClass
{
public string Id { get; set; }

public List<Custom> MyCustoms { get; set; }
}

public class Custom
{
public string Property1 { get; set; }

public List<string> Property2 { get; set; }
}

Can you kindly give me a hint how to map this ?
thanks