How to find a single record with Subsonic 3

 

How to find a single record with Subsonic 3 using SingleOrDefault or Find.
 
var customer = catalog.data.customer.SingleOrDefault(x => x.id == "00001");
customer_id.Text = customer.id;

 

var customer = catalog.data.customer.Find(x => x.name == "mark").OrderBy(x => x.left);