public RectangleF GetCollisionMBR() { //... return bCollisionMBRExists ? rfCollisionBoundingBox : null; } ↑ ↑ bool RectangleF 跑出错误 Type of conditional expression cannot be determined because there is no implicit conversion between 'System.Drawing.RectangleF' and '<null>' 请问这里要怎麽改? 感谢大德! -- ╮═╦═╮╮ ╭╭═╮╭═╮╮═╦═╮╭═╮Don't hold me with your eyes. ║ ║ ║║ ║║ ║║ ║║ ║ ║╠═╯The light in them I cannot see. ║ ║ ║╰═╣╰═╣╰═╰║ ║ ║╰═╯No need to blind me. ▁║▁ ║ ▂◣ There's this darkness where I walk. ▃▄▅▆▇╰═╯╰═╯▇▆▅▆▇████▆▇▅◣ˍ ~Playing My Game~ -- ◢◣ ︵︵ █▔◣ █▔█ █▔▔ █▔█ █▆▉ █ █▔█ █◣█ █▔● ◢◤█◣◢◣ ︵︵ █ █ █▁◤ █▁▁ █▁█ ▉▉▉ █ █▁█ █◥█ █ █ 梦之大地 逼逼ㄟ四 █▁◤ █ █ █▁▁ █ █ ▉▉▉ █▁ █ █ █ █ █▁◤ ※ Origin: <bbs.ccns.ncku.edu.tw> ◆ From: 210.240.182.67