System.Dynamic.SetMemberBinder.FallbackSetMember C# (CSharp) Method

        public DynamicMetaObject FallbackSetMember(DynamicMetaObject target, DynamicMetaObject value)
        {
            return FallbackSetMember(target, value, null);
        }

            public override DynamicMetaObject BindSetMember(SetMemberBinder binder, DynamicMetaObject value) {
                var binderDefault = binder.FallbackSetMember(this, value);

                Expression expression = GetSetValueExpression(binder.Name, value.Value);

                var dynamicSuggestion = new DynamicMetaObject(expression, BindingRestrictions.GetTypeRestriction(Expression, LimitType)
                                                                                             .Merge(binderDefault.Restrictions));

                return binder.FallbackSetMember(this, value, dynamicSuggestion);
            }