Winform中实现会旋转的Label控件

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

namespace UserCtrlLib
{
    public class RotateLabel:Label
    {
		public RotateLabel() {
			this.AutoSize = false;
            this.BackColor = Color.Transparent;
        }
		private float rotateAngle;
        [Description("旋转角度")]
        [Category("自定义外观")]
        public float RotateAngle
		{
			get { return rotateAngle; }
			set 
			{ 
				rotateAngle = value;
				Invalidate();
			}
		}

        protected override void OnPaint(PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            float w = Width;
            float h = Height;
            //将graphics坐标原点移到矩形中心点
            g.TranslateTransform(w / 2, h / 2);
            g.RotateTransform(RotateAngle);
            SizeF sz = g.MeasureString(Text, this.Font);
            float x = -sz.Width / 2;
            float y = -sz.Height / 2;
            Brush brush = new SolidBrush(this.ForeColor);
            g.DrawString(Text, this.Font, brush, new PointF(x, y));
        }
	}
}