namespace System.Net.NetworkInformation
{
    /// Provides information about network interfaces that support Internet Protocol (IP) version 4.0.
    public abstract class IPv6InterfaceProperties
    {
        /// Gets the interface index for the Internet Protocol (IP) address.
        public abstract int Index{get;}
 
        /// Gets the maximum transmission unit (MTU) for this network interface.
        public abstract int Mtu{get;}
 
        /// Returns IPv6 scope identifiers.
        public virtual long GetScopeId(ScopeLevel scopeLevel)
        {
            throw new NotImplementedException();
        }
    }
 }