Forum Post: RE: Error Adding Connections using REST and oData in Silverlight

I have resolved this issue.

In Silverlight, the EntityReference entity has only one constructor, with no parameters. That is why I was assigning values directly to the Id fields' properties. Doing the following instead allowed the Connection to be created:

EntityReference record1Id = new EntityReference();

record1Id.Id = new Guid(_activity_id);

record1Id.LogicalName = _activity_typename;

connToInsert.Record1Id = record1Id;

And so forth for Record2Id, Record1RoleId, and Record2RoleId.