I encountered the same problem when data type is MarshalByValueComponent.

 Hi,

 Could you please suggest me something?

 This code works witout exceptions:
 public partial class Form1 : Form
 {
     private object _source = null;
     public object Source
     {
         get { return _source; }
         set { _source = value; }
     }
     private object _target;
     public object Target
     {
         get { return _target; }
         set { _target = value; }
     }
     protected override void OnLoad(EventArgs e)
     {
         base.OnLoad(e);
         DataBindings.Add("Target", this, "Source");
     }
 }

 This code raises an exception at OnLoad ("Cannot format the value to the desired type"):
 public partial class Form1 : Form
 {
     private DataTable _source = null;
     public DataTable Source
     {
         get { return _source; }
         set { _source = value; }
     }
     private DataTable _target;
     public DataTable Target
     {
         get { return _target; }
         set { _target = value; }
     }
     protected override void OnLoad(EventArgs e)
     {
         base.OnLoad(e);
         DataBindings.Add("Target", this, "Source");
     }
 }

 The only defference here is the data type of properties.
 I have to make it work properly with null values and DataTable types.
 Do you have any ideas?

 Thanks!

 -- dmitry