using System;

using SmartFormat;

​

public class Program

{

    public static void Main()

    {

        var data = new { 

            x = 3,

            y = 3

        };

        Console.WriteLine(Smart.Format("The point ({x}, {y}) {x:choose({y}):is|is not} on the line y = x", data));

        Console.WriteLine(Smart.Format("The point ({x}, {y}) {x:cond:={y}?is|is not} on the line y = x", data));

    }

}