using System;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(PreprocessingText("ST STN, CONJUNTO J, * LOJAS T-40 /T41, - TER-REO, SHOPPING & BOULEVARD KM 28,5 VALOR 450.00 CENTRAL."));

    }

​

    private static string PreprocessingText(string input)

    {

        string pattern = @"(?i)(,|\.)?[^a-z0-9]\s|(\/|\-)";

        return Regex.Replace(input, pattern, " ");

    }

}