Remove duplicates from two Dictionary's

I found help only on keys or values but not both. So I figured this out.....
Removing duplicates based on keys & values.

 public Dictionary< int, bool> CompareDictionary(Dictionary< int, bool> newDic, Dictionary oldDic) // Compare two Dictionary
        {
            Dictionary comparedDic = null;

            if (newDic != null)
            {
                    comparedDic = new Dictionary();

                    foreach (KeyValuePair kvp in newDic)
                    {
                      
                        if (!oldDic.Contains(new KeyValuePair (kvp.Key, kvp.Value)))
                       {
                           comparedDic.Add(kvp.Key, kvp.Value);
                       }
                      
                    }
               
            }

            return comparedDic;
        }