Why do we need a binder or a binder object in general?

Question

C++ / C#

There is a code:

using System.Dynamic;
 
class PersonObject : DynamicObject
{
    Dictionary<string, object> members = new Dictionary<string, object>();
 
    // установка свойства
    public override bool TrySetMember(SetMemberBinder binder, object value)
    {
        members[binder.Name] = value;
        return true;
    }
    // получение свойства
    public override bool TryGetMember(GetMemberBinder binder, out object result)
    {
        result = null;
        if (members.ContainsKey(binder.Name))
        {
            result = members[binder.Name];
            return true;
        }
        return false;
    }
    // вызов метода
    public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
    {
        dynamic method = members[binder.Name];
        result = method((int)args[0]);
        return result != null;
    }
}

Here the binder is used to refer to properties and methods by name. So the question is: besides this, is it intended for something else? If yes, then why? Where else can binders be used, besides working with dynamic objects?

Answer 1

No.