using System;

using System.Collections.Generic;

using System.Linq.Expressions;

public class Program

{

    public static void Main()

    {

        Expression<Func<int, int>> plusOne = n => n + 1;

        ConsoleVisitor visitor = new ConsoleVisitor();

        visitor.Visit(plusOne.Body);

​

    }

    public class ConsoleVisitor : ExpressionVisitor 

    {

        public List<Data> Items {get;set;} = new List<Data>();

​

    protected override Expression VisitBinary(BinaryExpression node)

    {

        Console.Write("(");

        this.Visit(node.Left);

        switch (node.NodeType)

        {

            case ExpressionType.Add:

                Console.Write(" + ");

                break;

            case ExpressionType.Divide:

                Console.Write(" / ");

                break;

        }

        this.Visit(node.Right);

        Console.Write(")");

        return node;

    }

    protected override Expression VisitConstant(ConstantExpression node)

    {

        Console.Write(node.Value);

        return node;

    }

    protected override Expression VisitParameter(ParameterExpression node)

    {

        Console.Write(node.Name);

        return node;

    }

    }

    public class Data {

        public string NodeType {get;set;}

        public List<Data> Children {get;set;}

    }

}