string data = Clipboard.GetText();
if (data == "") return;
string[] line = data.Replace("\r\n", "\n").Replace("\r", "").Split('\n');
string ret = "";
for (int i = 0; i < line.Length; i++)
{
string temp = line[i];
if (temp.Trim() == "" || temp.Trim().StartsWith(";")) continue;
ret += temp + "\r\n";
}
Clipboard.SetText(ret);