Error when insert a shape layer

[xhqiao89]

tengu8740[CodePlex]
I can't send a report with internal tool.
The version is 1.7.3
When i try to load a shape i see this error but the shape is correctly loaded and viewed

System.NullReferenceException: Riferimento a un oggetto non impostato su un'istanza di oggetto.

in DotSpatial.Controls.Legend.HideEditBox()
in DotSpatial.Controls.Legend.OnMouseDown(MouseEventArgs e)
in System.Windows.Forms.Control.WmMouseDown(Messageamp m, MouseButtons button, Int32 clicks)

in System.Windows.Forms.Control.WndProc(Messageamp m)
in System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)