Question

Why does the AllowDrop property in VB.net not appear in the intellisense menu of a control?

Also why is it not in the propeties window of the designer?

Answer 1

Have a look at

picturebox allowdrop property missing?

There might be something stated about
this on MSDN perhaps? the picturebox
class seems to override that property
and hide it from the user. See for
yourself in Reflector if you want it
sets browsable to false, and
editbrowsabel to never

And Drag and Drop Text

For most controls, you can set the
AllowDrop property in the Properties
window during design time. However,
some controls (such as the PictureBox
control) do not expose this property
in the Properties window. As such, you
need to dynamically set them in code
(note that IntelliSense will not show
the AllowDrop property).