I've created simple UserContorl(WinForms) that consists of 1 TextBox(Txt) control, also i created property "Txt" that return this control(Txt). Now when i try to set DataBindings for this contorl from the VS designer through Txt property, it failed. i.e. you can set the property, but if you close vs designer and open it again DataBindings for Txt will be empty. What i am doing wrong ?