How to work with entity reference (lookup)?

[msymer]

I would like to update attribute of the account entity. The attribute is lookup to another entity. How can I do it? Something like this:

dynamic updateObject = new ExpandoObject();
updateObject.lookupattributeid= the_entity_reference;
dynamic updateResult = await api.Update("accounts", new Guid("1111111-2222-3333-4444-55555555"), updateObject, false);

[msymer]

Ok i got it.

dynamic updateObject = new ExpandoObject();

Guid accountID = new Guid("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx");    
var parAcctIndexer = updateObject as IDictionary<string, Object>;
parAcctIndexer["parentaccountid@odata.bind"] = "/accounts(" + accountID.ToString() + ")";

dynamic updateResult = await api.Update("accounts", new Guid("1111111-2222-3333-4444-55555555"), updateObject, false);