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

System.Runtime.InteropServices.StructLayoutAttribute

public sealed class StructLayoutAttribute : Attribute
namespace System.Runtime.InteropServices { public sealed class StructLayoutAttribute : Attribute { public CharSet CharSet; public int Pack; public int Size; public LayoutKind Value { get; } public StructLayoutAttribute(short layoutKind); public StructLayoutAttribute(LayoutKind layoutKind); } }