System.Net.Primitives by Microsoft

<PackageReference Include="System.Net.Primitives" Version="4.0.10-beta-22816" />

 IPAddressCollection

public virtual int Count { get; }

public virtual bool IsReadOnly { get; }

public virtual IPAddress this[int index] { get; }

public virtual void Add(IPAddress address)

public virtual void Clear()

public virtual bool Contains(IPAddress address)

public virtual void CopyTo(IPAddress[] array, int offset)

public virtual bool Remove(IPAddress address)