Random Password Generation in asp.net

Enhancing the same password generation logic so that it would be useful for generating random password using C# code.

    public static string GetRandomPassword(int length)
    {
        char[] chars = "$%#@!*abcdefghijklmnopqrstuvwxyz1234567890?;:ABCDEFGHIJKLMNOPQRSTUVWXYZ^&".ToCharArray();
        string password = string.Empty;
        Random random = new Random();

        for (int i = 0; i < length; i++)
        {
            int x = random.Next(1,chars.Length);
            //Don't Allow Repetation of Characters
            if (!password.Contains(chars.GetValue(x).ToString()))
                password += chars.GetValue(x);
            else
                i--;
        }      
        return password;
    }

Its a simple logic instead by generating a random number between 1 and Length of characters. It also checks that same character is not repeated in generated password and finally return the randomly generated password string of desired length.