private void ScriptTextBox_SelectionChanged(object sender, EventArgs e)
{
int selectionStart = ScriptTextBox.SelectionStart;
int index = ScriptTextBox.GetFirstCharIndexOfCurrentLine();
int row = ScriptTextBox.GetLineFromCharIndex(selectionStart) + 1;
int column = selectionStart - index + 1;
Console.WriteLine(row.ToString() + "," + column.ToString());
}