System.Linq.Expressions.IndexExpression.Rewrite C# (CSharp) Method

        internal Expression Rewrite(Expression instance, Expression[] arguments)
        {
            Debug.Assert(instance != null);
            Debug.Assert(arguments == null || arguments.Length == _arguments.Count);

            return Expression.MakeIndex(instance, Indexer, arguments ?? _arguments);
        }
    }

        /// <summary>
        /// Visits the children of the <see cref="IndexExpression" />.
        /// </summary>
        /// <param name="node">The expression to visit.</param>
        /// <returns>The modified expression, if it or any subexpression was modified;
        /// otherwise, returns the original expression.</returns>
        protected internal virtual Expression VisitIndex(IndexExpression node)
        {
            Expression o = Visit(node.Object);
            Expression[] a = VisitArguments(node);
            if (o == node.Object && a == null)
            {
                return node;
            }

            return node.Rewrite(o, a);
        }