<PackageReference Include="NETStandard.Library" Version="2.0.2" />

System.ComponentModel.Design.Serialization.DefaultSerializationProviderAttribute

namespace System.ComponentModel.Design.Serialization { public sealed class DefaultSerializationProviderAttribute : Attribute { public string ProviderTypeName { get; } public DefaultSerializationProviderAttribute(string providerTypeName); public DefaultSerializationProviderAttribute(Type providerType); } }