C#，判断字符，是否是数字或小数（利用正则表达式）

privatebool IsAllNumber(string text)
        {
            Regex objNotNumberPattern =new Regex("[^0-9.-]");
            Regex objTwoDotPattern =new Regex("[0-9]*[.][0-9]*[.][0-9]*");
            Regex objTwoMinusPattern =new Regex("[0-9]*[-][0-9]*[-][0-9]*");
            String strValidRealPattern ="^([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]+$";
            String strValidIntegerPattern ="^([-]|[0-9])[0-9]*$";
            Regex objNumberPattern =new Regex("("+ strValidRealPattern +")|("+ strValidIntegerPattern +")");
            return!objNotNumberPattern.IsMatch(text) &&!objTwoDotPattern.IsMatch(text) &&!objTwoMinusPattern.IsMatch(text) && objNumberPattern.IsMatch(text);
        }