Null Object Design Pattern

public class MemberEntity
{ 
   public virtual int Id { get; set; }
   public virtual string FullName { get; set; }
   public virtual string Email { get; set; }
}

MemberEntity memberEntityObject = null;
Console.WriteLine(memberEntityObject.Id);

public class MemberEntity
{
  public static readonly MemberEntity NULL = new NullMemberEntity();

  public virtual int Id { get; set; }
  public virtual string FullName { get; set; }
  public virtual string Email { get; set; }
}
class NullMemberEntity : MemberEntity
{
  public override int Id => 0;
  public override string FullName => string.Empty;
  public override string Email => string.Empty;
}

MemberEntity memberEntityObject = MemberEntity.NULL;
Console.WriteLine(memberEntityObject.Id);

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