Why isn't my text right aligned when I custom draw my strings?

Question

I'm trying to draw Right-Aligned text in a custom control, however, it seems for some reason it doesn't align to my target horizontal position and there's a difference between strings.

I can live with the fact that it doesn't exactly matches my target horizontal position, but the difference between strings is visually awful!

Any pointers?

The isolated code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace RightAlignTest {
    class RightControlTest : UserControl {
        public RightControlTest() {
            this.SetStyle(ControlStyles.UserPaint, true);
            this.SetStyle(ControlStyles.ResizeRedraw, true);
        }

        public static void DrawString(Graphics g, string s, Font f, RectangleF r, Color c) {
            float locx = r.Left;
            float locy = r.Top;
            SizeF txts = g.MeasureString(s, f);
            locx = (locx + r.Width - txts.Width);
            g.DrawString(s, f, new SolidBrush(c), locx, locy);
        }

        protected override void OnPaint(PaintEventArgs e) {
            base.OnPaint(e);
            int rightTarget = Width - 20;
            Font f = new Font("Arial Unicode MS", 13f, FontStyle.Regular);
            int i = 0;
            string[] strings = { "Current Limit 1:", "Current Limit 2:", "Temperature Center 1:", "Temperature Center 2:" };
            foreach (var s in strings) {
                Rectangle r1 = new Rectangle(0, 30 * i++, rightTarget, Height);
                DrawString(e.Graphics, s, f, r1, Color.Black);
            }
            e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Blue)), rightTarget, 0, rightTarget, Height);
        }
    }
    public partial class Form1 : Form {
        public Form1() {
            RightControlTest t = new RightControlTest();
            t.Dock = DockStyle.Fill;
            Controls.Add(t);
        }
    }
}

Answer 1

Try if this works:

public static void DrawString(
    Graphics g, string s, Font f, 
    RectangleF r, Color c) 
{
    StringFormat stringFormat = new StringFormat();
    stringFormat.Alignment = StringAlignment.Far;
    stringFormat.LineAlignment = StringAlignment.Center; // Not necessary here
    g.DrawString(s, f, new SolidBrush(c), r, stringFormat);
}

using StringFormat example taken from http://msdn.microsoft.com/en-us/library/332kzs7c.aspx