Linq: Except on two different types of dictionaries
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i have 2 different types of dictionaries `Dictionary<int, Fooclass> oldDic` and `Dictionary<int, string> barList newDic` . Now i need to compare values in both dictionaries. for Example key can be in

 - oldDic : 1,2,3
 - newDic : 1,2,3,4
 - Expected Output  : 4

Now i need to compare both dictionaries on basis of their keys 
any help would be appreciated.




