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

string output = "the date is $d and time is $t";
output = output.Replace("$t", t).Replace("$d", d);  //and so on