<PackageReference Include="NETStandard.Library" Version="2.0.3" />

System.IO.WaitForChangedResult

public struct WaitForChangedResult
namespace System.IO { public struct WaitForChangedResult { public WatcherChangeTypes ChangeType { get; set; } public string Name { get; set; } public string OldName { get; set; } public bool TimedOut { get; set; } } }