xamarinmac 
namespace CoreWCF.Channels
{
    public abstract class MessageHeader : MessageHeaderInfo
    {
        public override string ToString();
    }
}
.NET
5.06.07.08.09.010.0
.NET Core
2.02.12.23.03.1
.NET Framework
4.6.14.6.24.74.7.14.7.24.84.8.1
.NET Standard
2.02.1
Information specific to xamarinmac
Assembly

CoreWCF.Primitives , Version=1.7.0.0, PublicKeyToken=64a15a7b0fecbbfb

Referencing

Your project needs a package reference to CoreWCF.Primitives.

Package CoreWCF.Primitives (1.7.0) netstandard2.0
Platform Restrictions

This framework does not have platform annotations.

  • Built-in API
  • Package-provided API