http://social.msdn.microsoft.com/Forums/vstudio/en-US/8cf60e57-6d97-43c6-bb3a-394b9bf130af/the-toolstripmenuitem-visible-value-always-false?forum=csharpgeneral
use
ToolStripMenuItem.Available
property instead of
ToolStripMenuItem.Visible
本文共 289 字，大约阅读时间需要 1 分钟。
http://social.msdn.microsoft.com/Forums/vstudio/en-US/8cf60e57-6d97-43c6-bb3a-394b9bf130af/the-toolstripmenuitem-visible-value-always-false?forum=csharpgeneral
use
ToolStripMenuItem.Available
property instead of
ToolStripMenuItem.Visible
转载于:https://www.cnblogs.com/xiangniu/p/3431934.html