Dynamic string interpolation

This generic solution Extend the answer provided by @Dan
It can be used for any typed object.

install System.Linq.Dynamic

     Install-Package System.Linq.Dynamic -Version 1.0.7 

    string ReplaceMacro(string value, object @object)
    {
        return Regex.Replace(value, @"{(.+?)}", 
        match => {
            var p = Expression.Parameter(@object.GetType(), @object.GetType().Name);                
            var e = System.Linq.Dynamic.DynamicExpression.ParseLambda(new[] { p }, null, match.Groups[1].Value);
            return (e.Compile().DynamicInvoke(@object) ?? "").ToString();
        });
    }

See a working demo for a Customer type

Two suggestions:

DataBinder.Eval

string ReplaceMacro(string value, Job job)
{
    return Regex.Replace(value, @"{(?<exp>[^}]+)}", match => {
        return (System.Web.UI.DataBinder.Eval(new { Job = job }, match.Groups["exp"].Value) ?? "").ToString();
    });
}

Linq.Expression

Use the Dynamic Query class provided in the MSDN LINQSamples:

string ReplaceMacro(string value, Job job)
{
    return Regex.Replace(value, @"{(?<exp>[^}]+)}", match => {
        var p = Expression.Parameter(typeof(Job), "job");
        var e = System.Linq.Dynamic.DynamicExpression.ParseLambda(new[] { p }, null, match.Groups["exp"].Value);
        return (e.Compile().DynamicInvoke(job) ?? "").ToString();
    });
}

In my opinion, the Linq.Expression is more powerful, so if you trust the input string, you can do more interesting things, i.e.:

value = "{job.Name.ToUpper()} job for admin"
return = "TODO job for admin"

You could use RazorEngine:

using RazorEngine;

class Program 
{
    static void Main(string[] args)
    {
        Console.WriteLine(ReplaceMacro("@Model.Name job for admin", new Job { Id = 1, Name = "Todo", Description="Nothing" }));
        Console.ReadLine();
    }

    static string ReplaceMacro(string value, Job job)
    {
        return Engine.Razor.RunCompile(value, "key", typeof(Job), job);
    }
}

It even supports Anonymous Types and method calls:

string template = "Hello @Model.Name. Today is @Model.Date.ToString(\"MM/dd/yyyy\")";
var model = new { Name = "Matt", Date = DateTime.Now };

string result = Engine.Razor.RunCompile(template, "key", null, model);

You can't use string interpolation this way. But you can still use the pre-C#6 way to do it using string.Format:

static void Main(string[] args)
{
    Console.WriteLine(ReplaceMacro("{0} job for admin", new Job { Id = 1, Name = "Todo", Description = "Nothing" }));
    Console.ReadLine();
}

static string ReplaceMacro(string value, Job job)
{
    return string.Format(value, job.Name);
}