I have two tables

Existing table

{{ID: 1, Codes: { 1,2,3}},{ID: 2, Codes: {4,5,6,7}}, {ID: 3, Codes: {8,9,10,11}}}

and an incoming table

{{ID: x, Codes: { 1,2,3}},{ID: x, Codes: {4,5,6,7}},{ID: x, Codes: {13,14,15,16}}}

I want to get the new row out of the incoming data. So, new data can be inserted into my existing table. I want the putout to be the following:

{{ID: x, Codes: {13,14,15,16}}}

Can someone help me write a Linq query?