c#在用winfrom时 怎样实现模糊搜索

void LoadLrc()
{
string songPath=listSongs[listBox1.SelectedIndex];
string[] songPath1 = songPath.Split(new char []{'.'}, StringSplitOptions.RemoveEmptyEntries);
string void LoadLrc()
{
string songPath=listSongs[listBox1.SelectedIndex];
string[] songPath1 = songPath.Split(new char []{'.'}, StringSplitOptions.RemoveEmptyEntries);
string songPath2=;
if (File.Exists(songPath2))
{
string []lrcText = File.ReadAllLines(songPath ,Encoding .Default );
FormatLrc(lrcText);
}
else
{
lblLrc.Text = "-------------歌词未找到-------------";
}
}=;
if (File.Exists(songPath2))
{
string []lrcText = File.ReadAllLines(songPath ,Encoding .Default );
FormatLrc(lrcText);
}
else
{
lblLrc.Text = "-------------歌词未找到-------------";
}
}

            我想让   songPath2  的搜索结果为  ****songPath1【0】****.lrc      该怎么写呀     谢谢

 string[] files = Directory.GetFiles(目录, "*关键字*.lrc");
if (files.Count() > 0)
...