[System.Diagnostics.DebuggerDisplay("Count={Count}")]
[System.Diagnostics.DebuggerTypeProxy(typeof(System.Collections.Generic.CollectionDebuggerView`2))]
public class HashSet<T> : ICollection<T>, IEnumerable<T>, ISet<T>, System.Runtime.Serialization.IDeserializationCallback, System.Runtime.Serialization.ISerializable