// @nuget: Z.Expressions.Eval

​

using System;

using System.Collections.Generic;

using Z.Expressions;

​

public class Program

{

    public static void Main()

    {

        var emailTemplate = GetEmailTemplate();

        var customer = GetCustomerData();

        var emailText = Eval.Execute<string>($"return $$'''{emailTemplate}'''", customer); // return 6

        Console.Write(emailText);

    }

    public static string GetEmailTemplate() 

    {

        return @"

Dear {{Title}} {{Name}},

​

Thank you for your recent order with us! We are currently processing the following items:

​

<table>

<tr><td>Product Name</td><td>Quantity</td></tr>

{{ 

    var sb = new StringBuilder();

    foreach(var item in Items) { 

        sb.AppendLine($$""""""<tr><td>{{item.Name}}</td><td>{{item.Quantity}}</td></tr>"""""");

    }

    return sb.ToString();

}}

</table>

​

We will notify you once your order is shipped. You can track the status of your order through your account on our website.

​

Thank you for choosing us, and we look forward to serving you again!

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Best regards,

​

The Customer Service Team

";

    }

    public static Customer GetCustomerData()

    {

        var customer = new Customer() { Title = "Mr.", Name = "Jonathan", Items = new List<OrderItem>() };

        customer.Items.Add(new OrderItem() { Name = "C# Eval Expression", Quantity = 1 }); 

        customer.Items.Add(new OrderItem() { Name = "Dapper Plus", Quantity = 4 }); 

        customer.Items.Add(new OrderItem() { Name = "Entity Framework Extensions", Quantity = 9 }); 

​

        return customer;

    }

    public class Customer

    {

        public string Title { get; set; }

        public string Name { get; set; }

        public List<OrderItem> Items { get; set; }

    }

    public class OrderItem

    {

        public string Name { get; set; }

        public int Quantity { get; set; }

    }

}

​

​