C# 判断字符串是否是int/double

using System.Text.RegularExpressions;

/// <summary>
/// 判断字符串是否是int/double
/// </summary>
public static bool IsIntOrDouble(string strNumber)
{
    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]*");
    const string strValidRealPattern = "^([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]+$";
    const string strValidIntegerPattern = "^([-]|[0-9])[0-9]*$";
    Regex objNumberPattern = new Regex("(" + strValidRealPattern + ")|(" + strValidIntegerPattern + ")");
    return !objNotNumberPattern.IsMatch(strNumber) &&
           !objTwoDotPattern.IsMatch(strNumber) &&
           !objTwoMinusPattern.IsMatch(strNumber) &&
           objNumberPattern.IsMatch(strNumber);
}