InitializeFromCollection.cs

InitializeFromCollection.cs

private void InitializeFromCollection(IEnumerable<KeyValuePair<TKey, TValue>> collection)
{
    TValue dummy;
    foreach (KeyValuePair<TKey, TValue> pair in collection)
    {
        if (pair.Key == null) throw new ArgumentNullException("key");

        if (!TryAddInternal(pair.Key, pair.Value, false, false, out dummy))
        {
            throw new ArgumentException(GetResource("ConcurrentDictionary_SourceContainsDuplicateKeys"));
        }
    }
}