| RectF(PointF, SizeF) | Initializes a new instance of the RectF structure from location and size 从位置和大小初始化RectF结构的新实例 |
| RectF(Single, Single, Single, Single) | Represents a rectangle structure with single-precision floating-point coordinates and dimensions 表示具有单精度浮点坐标和尺寸的矩形结构 |