private void Split(int iLine, FastColoredTextBox tb, string s)
{
string[] sep = s.Split(':');
tb.Selection.Start = new Place(0, iLine);
tb.Selection.Expand();
string seperator;
if (sep.Length == 3 && sep[1] == string.Empty)
seperator = ":";
else
seperator = sep[1];
var lines = tb.SelectedText.Split(seperator.ToCharArray());
tb.ClearSelected();
foreach (string line in lines)
{
tb.InsertText(line+"\n");
}
tb.ClearCurrentLine();
}