using System.Text.RegularExpressions;
public static void Main()
var propostaComTranslate = "teste1 01/03/1992 - teste2 01/03/1992 - teste3 01/03/1992";
propostaComTranslate = Regex.Replace(propostaComTranslate, @"[0-9]{2}\/[0-9]{2}\/[0-9]{4}", delegate(Match m)
var dataSplit = m.Value.Split('/').ToArray();
var dataStr = new DateTime(Convert.ToInt32(dataSplit[2]), Convert.ToInt32(dataSplit[1]), Convert.ToInt32(dataSplit[0])).ToShortDateString();
Console.WriteLine(propostaComTranslate);