Is there a way to remove the border of the linear gauge panel or to change the color?

Hi Toni,

Yes - you can remove the border by simply assigning null to the Border property:
linearGauge.BorderStyle = null;

You can also change the color - for example:

   NStrokeBorderStyle strokeBorder = new NStrokeBorderStyle();

   strokeBorder.StrokeStyle.Color = Color.Red;
   strokeBorder.StrokeStyle.Width = new NLength(2.0f);
   strokeBorder.Shape = BorderShape.RoundedRect;

   linearGauge.BorderStyle = strokeBorder;

Creates a red rounded border around the gauge. You can also find more information in the following topic:
http://helpdotnetvision.nevron.com/UsersGuide_Panels_BorderAndBackground.html

Hope this helps - let us know if you have any questions or comments.

Best Regards,
Nevron Support Team