Is it possible to include a C# variable in a string variable without using a concatenator?

Question

Does .NET 3.5 C# allow us to include a variable within a string variable without having to use the + concatenator (or string.Format(), for that matter).

For example (In

Answer 1

Based on the great answer of @JesperPalm I found another interesting solution which let's you use a similar syntax like in the normal string.Format method:

public static class StringExtensions
{
    public static string Replace(this string text, T values)
    {
        var sb = new StringBuilder(text);
        var properties = typeof(T)
            .GetProperties(BindingFlags.Public | BindingFlags.Instance)
            .ToArray();

        var args = properties
            .Select(p => p.GetValue(values, null))
            .ToArray();

        for (var i = 0; i < properties.Length; i++)
        {
            var oldValue = string.Format("{{{0}", properties[i].Name);
            var newValue = string.Format("{{{0}", i);

            sb.Replace(oldValue, newValue);
        }

        var format = sb.ToString();

        return string.Format(format, args);
    }
}

This gives you the possibility to add the usual formatting:

var hello = "Good morning";
var world = "Mr. Doe";
var s = "{hello} {world}! It is {Now:HH:mm}."
    .Replace(new { hello, world, DateTime.Now });

Console.WriteLine(s); // -> Good morning Mr. Doe! It is 13:54.