namespace System.Collections.Generic
{
    [DefaultMember("Item")]
    public class Dictionary<TKey, TValue> : ICollection<KeyValuePair<TKey, TValue>>, IDictionary<TKey, TValue>, IEnumerable, IEnumerable<KeyValuePair<TKey, TValue>>, IReadOnlyCollection<KeyValuePair<TKey, TValue>>, IReadOnlyDictionary<TKey, TValue>, ICollection, IDictionary, IDeserializationCallback, ISerializable
        where TKey, notnull
    {
        [EditorBrowsable(EditorBrowsableState.Never)]
        [Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId = "SYSLIB0051", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
        protected Dictionary(SerializationInfo! info, StreamingContext context);
    }
}