when should I use the Webservice attribute System.ComponentModel.ToolboxItem(false)

Question

When should we add this attribute to an asp.net webservice ?

[System.ComponentModel.ToolboxItem(false)]  

Answer 1

Not sure at all how this has to do with a webservice.

See the ToolboxItem at MSDN. The constructor you mentioned, is used to specify a default type of toolbox item typically for a custom control.

As in this example on MSDN you can use this attribute to customize how your UserControl shows on the Visual Studio toolbox.