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

System.ComponentModel.DesignerSerializationVisibilityAttribute

namespace System.ComponentModel { public sealed class DesignerSerializationVisibilityAttribute : Attribute { public static readonly DesignerSerializationVisibilityAttribute Content; public static readonly DesignerSerializationVisibilityAttribute Default; public static readonly DesignerSerializationVisibilityAttribute Hidden; public static readonly DesignerSerializationVisibilityAttribute Visible; public DesignerSerializationVisibility Visibility { get; } public DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility visibility); } }