判断字符还是数字的方法。

using System;
using System.Text.RegularExpressions;
using System.Collections;

public class MyClass
{
 public static void Main()
 {
  string aa = "11";
  
  if(Regex.Replace(aa,@"\d*","",RegexOptions.None).Length == 0)
  {
   Console.WriteLine("Numeric");
  }
  aa = "adfadsf哈哈哈";
  
  if(Regex.Replace(aa,@"\D*","",RegexOptions.None).Length == 0)
  {
   Console.WriteLine("Char");
  }
  Console.Read();
 }
}