Xamarin.Forms by Microsoft

<PackageReference Include="Xamarin.Forms" Version="4.3.0.947036" />

.NET API 1,172,080 bytes

 SynchronizedList<T>

public int Count { get; }

public T this[int index] { get; set; }

public void Add(T item)

public void Clear()

public bool Contains(T item)

public void CopyTo(T[] array, int arrayIndex)

public int IndexOf(T item)

public void Insert(int index, T item)

public bool Remove(T item)

public void RemoveAt(int index)