Not exactly sure what you want to do, but if you want to filter out files with a specific extension in a directory you should use
Directory.GetFiles[
^]
Something like this, but I don't think anyone would be happy with a functionality like this. :-P
private void button1_Click(object sender, EventArgs e)
{
string path = @"C:\ProgramData\Microsoft\Windows\Start Menu\Programs";
foreach (string fileName in Directory.GetFiles(path, "*.lnk"))
{
Process.Start(fileName);
}
}