I have a custom workflow activity that I created that has an object as a parameter.
The object has a property that is a list of another object.

In the designer, I am able to set all the required fields of the sub-objects and they save and retrieve properly.

The problem happens when the workflow runs.
The base object appears to exist, but the list of child objects is null.

When I reopen the workflow in designer the data is in the designer.

I have a second property that is just a list of objects and that works fine.

In the profile activity file, they are defined as

        public List<MyDocument> Documents { get; set; }

        public MyRecipients Recipients { get; set; }

in the proxy, they are defined as

        /// <summary>The backing field for the Documents property.</summary>

        private List<MyDocument> documents = null;



        /// <summary>The backing field for the Recipients property.</summary>

        private MyRecipients recipients = null;

The MyDocuments class is just a basic object with basic properties.   

 public class MyDocument

    {

        public int ID { get; set; }

        public string Name { get; set; }

        public string MimeType { get; set; }

        public string DocuentId { get; set; }

        public Byte[] Bytes { get; set; }

    }

The MyRecipients class has multiple lists of an object MyRecipient separated by type of recipient.   

public class MyRecipients

    {

        public List<MyRecipient> PrimaryRecipients { get; set; }

        public List<MyRecipient> SecondaryRecipients { get; set; }

    }



    public class MyRecipient

    {

        public int ID { get; set; }

        public string Name { get; set; }

        public string email { get; set; }

    }