And this is of course ignoring the fact you copied that from the documentation witch shows all interfaces the class implements. IDictionary also implements ICollection & IEnumerable so you wouldn't need to include them. So to actually implement this class it would more likely be
[SerializableAttribute]
[ComVisibleAttribute(false)]
public class Dictionary<TKey, TValue> :
IDictionary<TKey, TValue>,
IDictionary,
IReadOnlyDictionary<TKey, TValue>,
ISerializable,
IDeserializationCallback
{
...
}
[SerializableAttribute] [ComVisibleAttribute(false)] public class Dictionary<TKey, TValue> : IDictionary<TKey, TValue>, ICollection<KeyValuePair<TKey, TValue>>, IDictionary, ICollection, IReadOnlyDictionary<TKey, TValue>, IReadOnlyCollection<KeyValuePair<TKey, TValue>>, IEnumerable<KeyValuePair<TKey, TValue>>, IEnumerable, ISerializable, IDeserializationCallback { ... }
And this is of course ignoring the fact you copied that from the documentation witch shows all interfaces the class implements. IDictionary also implements ICollection & IEnumerable so you wouldn't need to include them. So to actually implement this class it would more likely be
[SerializableAttribute] [ComVisibleAttribute(false)] public class Dictionary<TKey, TValue> : IDictionary<TKey, TValue>, IDictionary, IReadOnlyDictionary<TKey, TValue>, ISerializable, IDeserializationCallback { ... }
maybe less