Problem with User control in VC# .net

Hi All,
I’m using Visual Studio 2005 VC#. With that I’ve created a User control with a label and a picture box. I’ve included some custom properties to that user control. That’s all working fine. The problem I’m facing is I need to allow user to enter “multiline” text in one of the miscellaneous properties of the user control.
Can anyone have idea about this? (Even I override “Text” property of base, it doesn’t allow user to enter multiline text, as done with normal label’s “Text” property)