可能将它们的属性设置为ReadOnly以开始，并且menustrip的代码启用它们。某处您要么禁用它们，要么启用它们。您需要查看代码以找出问题的位置，因为我们无法看到您拥有的内容。

It's possible their properties are set to ReadOnly to start with and the code for the menustrip enables them. Somewhere you are either disabling them or enabling them. You'll need to look through the code to find where the issue is since we can't see what you have.