/// 获取A点绕B点旋转P度后的新坐标
       /// </summary>
       /// <param name="Angle">角度</param>
       /// <param name="CirPoint">圆心坐标</param>
       /// <param name="MovePoint">移动点的坐标</param>
       /// <param name="FlagInt">顺时针：1(默认)  逆时针:-1</param>
       /// <returns></returns>       

public static Point GetNewPoint(double Angle, Point CirPoint, Point MovePoint, int FlagInt = 1)
       {
           //将角度转换成弧度
           double Rage2 = Convert.ToDouble(Angle) / 180 * Math.PI;
           //计算新坐标X
           int newx = (int)((MovePoint.X - CirPoint.X) * Math.Cos(Rage2 * FlagInt) - (MovePoint.Y - CirPoint.Y) * Math.Sin(Rage2 * FlagInt));
           //计算新坐标Y
           int newy = (int)((MovePoint.Y - CirPoint.Y) * Math.Cos(Rage2 * FlagInt) + (MovePoint.X - CirPoint.X) * Math.Sin(Rage2 * FlagInt));
           //计算新坐标
           Point newpoint = new Point(CirPoint.X + newx, CirPoint.Y + newy);
           //返回新坐标
           return newpoint;
       }

创作不易，小小的支持一下吧！