Dictionary<string, string> first= new Dictionary<string, string>();
 Dictionary<string, string> second = new Dictionary<string, string>();


first.Add("NAME", "NAME");
first.Add("TYPE", "TYPE");
first.Add("REF","REF");
first.Add("NUMBER", "NUMBER");
first.Add("DATE", "DATE");
first.Add("SOURCE", "SOURCE");

second.Add("TYPE", "T1");
second.Add("REF","A1234");
second.Add("NUMBER", "B456");
second.Add("DATE", "D123455");
second.Add("NAME", "NAME");
second.Add("SOURCE", "SOURCE");

("NAME", "NAME");
("TYPE", "T1");
("REF","A1234");
("NUMBER", "B456");
("DATE", "D123455");
("SOURCE", "SOURCE");