using System;

using RazorEngine;

using RazorEngine.Templating; // For extension methods.

using Test;

​

public class Program

{

    public class MyModel

    {

        public string Name

        {

            get;

            set;

        }

    }

​

    public static void Main()

    {

        var model = new MyModel{Name = "hello"};

        string template = $"@using Test\nHello @Model.Name.WordCount(), welcome to RazorEngine!";

        var result = Engine.Razor.RunCompile(template, "templateKey", typeof(MyModel), model);

        Console.WriteLine(result);

        Console.WriteLine(template.WordCount());

    }

}

​

namespace Test

{

    public static class MyExtensions

    {

        public static int WordCount(this String str)

        {

            return str.Split(new char[]{' ', '.', '?'}, StringSplitOptions.RemoveEmptyEntries).Length;

        }

    }

}