Actually what I needed is a bit more complicated. I first used MeasureString to create a rectangle for the text. Then I want to rotate that rectangle and find the largest "non-rotate" rectangle that rectangle will fit in. I don't care about the location of the largest rectangle, just the width and height. I did figure this out with a bunch of math. here is the routine if anyone is interested. Note that the rect that is passed into this routine is the rect created using MeasureString. private RectangleF FindBoundingRect(RectangleF rect, float angle) { // Do a quick short cut here if the text is not really rotated // but is instead horizontal or rotated. if (angle == 0 || angle == 180 || angle == 360) { return new RectangleF(0, 0, rect.Width, rect.Height); } else if (angle == 90 || angle == 270) { return new RectangleF(0, 0, rect.Height, rect.Width); } else if (angle > 360) { // Don't handle this case for now. return new RectangleF(0, 0, 0, 0); } // First transform the angle to radians. float radianAngle = angle * (float)(Math.PI / 180.0F); float radian90Degrees = 90 * (float)(Math.PI / 180.0F); // First find the rotated point 1. This is the bottom right point. The radius // for this point is the width. float x = (float)(rect.Width * Math.Cos(radianAngle)); float y = (float)(rect.Width * Math.Sin(radianAngle)); PointF p1 = new PointF(x, y); // Now find point 3 which is also easy. This is the top left point. The // radius for this point is the height. x = (float)(rect.Height * Math.Cos(radianAngle + radian90Degrees)); y = (float)(rect.Height * Math.Sin(radianAngle + radian90Degrees)); PointF p3 = new PointF(x, y); // Point 2, the top right point, is a bit trickier. First find the angle // from the bottom left up to the top left when the rect is not rotated. float radianAngleP2 = (float) Math.Atan(rect.Height / rect.Width); // Now find the length of the diagonal line between these two points. float radiusP2 = (float) Math.Sqrt((rect.Height * rect.Height) + (rect.Width * rect.Width)); // Now we can find the x,y of point 2 rotated by the specified angle. x = (float)(radiusP2 * Math.Cos(radianAngle + radianAngleP2)); y = (float)(radiusP2 * Math.Sin(radianAngle + radianAngleP2)); PointF p2 = new PointF(x, y); // Now based on the original angle we can figure out the width and height // of our returned rectagle. float width = 0; float height = 0; if (angle < 90) { width = p1.X + Math.Ab
