<PackageReference Include="NETStandard.Library" Version="2.0.1" />

System.Runtime.InteropServices.HandleCollector

public sealed class HandleCollector
namespace System.Runtime.InteropServices { public sealed class HandleCollector { public int Count { get; } public int InitialThreshold { get; } public int MaximumThreshold { get; } public string Name { get; } public HandleCollector(string name, int initialThreshold); public HandleCollector(string name, int initialThreshold, int maximumThreshold); public void Add(); public void Remove(); } }