c#读取输入字符串，从数据源中查找以该字符串开头的所有字符串（使用正则表达式）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;//引用正则表达式需要的头文件
using System.Threading.Tasks;

namespace RegexApplication
{
class Program
{
static void Main(string[] args)
{
string i = Console.ReadLine();
Regex r = new Regex(@"^"+i);// 创造以输入字符串开头的正则表达式
string[] str = Data();//数据源
foreach(string k in str){//在数据源中不断查找匹配项
if(r.IsMatch(k)){
Console.WriteLine(k);
}
}
Console.ReadLine();
}
public static string[] Data() {

string[] Mystring=new string[14];
Mystring[0] = "aa123e";
Mystring[1] = "aawwe";
Mystring[2] = "aa3445";
Mystring[3] = "abssdsf";
Mystring[4] = "aatyu";
Mystring[5] = "agfdh";
Mystring[6] = "bbfdge";
Mystring[7] = "bbf1222g";
Mystring[8] = "bbfdge";
Mystring[9] = "bbf";
Mystring[10] = "bbfdge";
Mystring[11] = "bbooouy";
Mystring[12] = "byytre";
Mystring[13] = "brrre";
return Mystring;

}
}
}