<PackageReference Include="NETStandard.Library" Version="2.0.0-preview2-25401-01" />

System.Runtime.Serialization.CollectionDataContractAttribute

namespace System.Runtime.Serialization { public sealed class CollectionDataContractAttribute : Attribute { public bool IsItemNameSetExplicitly { get; } public bool IsKeyNameSetExplicitly { get; } public bool IsNameSetExplicitly { get; } public bool IsNamespaceSetExplicitly { get; } public bool IsReference { get; set; } public bool IsReferenceSetExplicitly { get; } public bool IsValueNameSetExplicitly { get; } public string ItemName { get; set; } public string KeyName { get; set; } public string Name { get; set; } public string Namespace { get; set; } public string ValueName { get; set; } public CollectionDataContractAttribute(); } }