public static Dictionary <K, V> Merge <K, V>(this IDictionary <K, V> self, DictionaryMergeCollisionBehavior collisionBehavior, IEnumerable <IDictionary <K, V> > rest)
{
var result = self.ToDictionary(p => p.Key, p => p.Value);
foreach (IDictionary <K, V> d in rest)
{
foreach (KeyValuePair <K, V> pair in d)
{
K key = pair.Key;
V value = pair.Value;
if (result.ContainsKey(key))
{
switch (collisionBehavior)
{
case DictionaryMergeCollisionBehavior.Exception:
throw new Exception();
case DictionaryMergeCollisionBehavior.ChooseLeft:
value = result[key];
break;
case DictionaryMergeCollisionBehavior.ChooseRight:
break;
}
}
result[key] = value;
}
}
return(result);
}
public static Dictionary <K, V> Merge <K, V>(this IDictionary <K, V> self, DictionaryMergeCollisionBehavior collisionBehavior, IDictionary <K, V> first, params IDictionary <K, V>[] rest) => Merge(self, collisionBehavior, new[] { first }.Concat(rest));