dotnet-core/release-notes/2.1/Preview/api-diff/preview2/2.1-preview2_System.Reflection.Metadata.md

System.Reflection.Metadata

 namespace System.Reflection.Metadata {
     public sealed class DebugMetadataHeader {
+        public int IdStartOffset { get; }
     }
     [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
     public struct TypeDefinition {
+        public bool IsNested { get; }
     }
 }