I can't believe these properties aren't already natively implemented. Come on Microsoft... we do live in the year 2007 you know!!

I know that you can do this using P/Invoke and SendMessage but i wanted a nice managed way of finding

the current line and column of the Caret position in a multiline TextBox.

After a bit of experimenting i've come up with this extended class:

public class TextBoxEx : TextBox
{
    public TextBoxEx()
    { }
<span class="kwrd">public</span> <span class="kwrd">void</span> GoTo(<span class="kwrd">int</span> line, <span class="kwrd">int</span> column)
{
    <span class="kwrd">if</span> (line &lt; 1 || column &lt; 1 || <span class="kwrd">this</span>.Lines.Length &lt; line)
        <span class="kwrd">return</span>;
    
    <span class="kwrd">this</span>.SelectionStart = <span class="kwrd">this</span>.GetFirstCharIndexFromLine(line - 1) + column - 1;
    <span class="kwrd">this</span>.SelectionLength = 0;
}

<span class="kwrd">public</span> <span class="kwrd">int</span> CurrentColumn
{
    get { <span class="kwrd">return</span> <span class="kwrd">this</span>.SelectionStart - <span class="kwrd">this</span>.GetFirstCharIndexOfCurrentLine() + 1; }
}

<span class="kwrd">public</span> <span class="kwrd">int</span> CurrentLine
{
    get { <span class="kwrd">return</span> <span class="kwrd">this</span>.GetLineFromCharIndex(<span class="kwrd">this</span>.SelectionStart) + 1; }
}

}

Hope you find it usefull. If anyone knows a better way do let me know.

UPDATE: With a bit of help from Andrej this is a better and shorter version with set method too.