Unity3D StringManipulation (Format) like Underscore template

StringManipulation.js

#pragma strict

import System.Text.RegularExpressions;

public class StringManipulation {
  private static var interpolate : String = "\\{(.+?)\\}";

  /**
   * Example use:  StringManipulation.Format("{name} {weather}", {
                     "name": "Tom",
                     "weather": "Rain"
                   }); -> "Tom Rain"
   */
  public static function Format(value:String, args:Hashtable) : String {
    var match = Regex.Match(value, interpolate);
    while(match.Success) {
      var key : String = match.Groups[1].Value;
      var replacement : String = args[key] as String;
      if(replacement.length > 0) {
        value = value.Replace(match.Value, replacement);
      }
      // Debug.Log("Value: "+value);
      // Debug.Log("Key: "+key);
      // Debug.Log("Replacement: "+replacement);
      // Debug.Log("Match: " + match.Value + " Success: "+match.Success);
      // Debug.Log("============================================");
      match = match.NextMatch();
    }

    return value;
  }
}