C#自定义控件 在 Toolbox显示不了的问题

It isn't necessary to reset the whole configuration.
Try this:

1) Close your solution
2) Tools->Options->"Windows Form Designer"
- find AutoToolboxPopulate property in Toolbox category and set 'true'
3) Open your solution.

Thanks,
Jordan

转自

http://www.codeguru.com/forum/archive/index.php/t-422498.html