用C#产生随机密码

private     static     char []   constant = {   
                                                 '0','1','2','3','4','5','6','7','8','9',   
                                                 'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',   
                                                 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'   
                                             } ;   
         public     static     string    GenerateRandom( int    Length)   
         {         
            System.Text.StringBuilder   newRandom   =   new   System.Text.StringBuilder(62);   
            Random   rd=   new   Random();   
            for(int   i=0;i<Length;i++)   
            {   
                newRandom.Append(constant[rd.Next(62)]);   
            }   
            return   newRandom.ToString();   
        }