<PackageReference Include="NETStandard.Library" Version="2.0.0" />

System.ComponentModel.Design.Serialization.IDesignerLoaderService

public interface IDesignerLoaderService
namespace System.ComponentModel.Design.Serialization { public interface IDesignerLoaderService { void AddLoadDependency(); void DependentLoadComplete(bool successful, ICollection errorCollection); bool Reload(); } }