PriorityQueue api surface

PriorityQueue.cs

namespace System.Collections.Generic
{
    class PriorityQueue<T> : ICollection<T>
    {
        #region Constructors
        public PriorityQueue() { }
        public PriorityQueue(IComparer<T> comparer) { }
        public PriorityQueue(IEnumerable<T> items) { }
        public PriorityQueue(IEnumerable<T> items, IComparer<T> comparer) { }
        #endregion

        #region ICollection
        public void Clear() { }
        public bool Contains(T item) { throw null; }
        public int Count { get { throw null; } }
        public void CopyTo(T[] array, int arrayIndex) { }
        public Enumerator GetEnumerator() { throw null; }
        void ICollection<T>.Add(T item) { }
        bool ICollection<T>.IsReadOnly { get { throw null; } }
        IEnumerator IEnumerable.GetEnumerator() { throw null; }
        public bool Remove(T item) { throw null; }
        #endregion

        #region Specific APIs
        public IComparer<T> Comparer { get { throw null; } }
        public T Dequeue() { throw null; }
        public void Enqueue(T item) { }
        public T Peek() { throw null; }
        public bool TryDequeue(out T item) { throw null; }
        public bool TryPeek(out T item) { throw null; }
        #endregion
        
        #region Enumerator
        public struct Enumerator : IEnumerator<T>, IEnumerator, IDisposable
        {
            public T Current { get { throw null; } }
            object System.Collections.IEnumerator.Current { get { throw null; } }
            public void Dispose() { }
            public bool MoveNext() { throw null; }
            void System.Collections.IEnumerator.Reset() { }
        }
        #endregion
    }
}