Support for System.Drawing.Font

Hi all, 

I'm trying to use System.Drawing.Font to calculate the height in pixels of a font I am using in a TextBlock control. I am getting an error as follows:
 

Error | Crashed in OnStart with DllNotFoundException: Unable to load DLL 'gdiplus.dll' or one of its dependencies: 0x80070005 (E_ACCESSDENIED)

Here is a cBot to reproduce the problem:

using System.Runtime.Versioning;
using cAlgo.API;

namespace cAlgo.Robots {

	[Robot(AccessRights = AccessRights.None, AddIndicators = true)]
	[SupportedOSPlatform("windows")]
    public class FontTest : Robot
    {

        protected override void OnStart()
        {

			var fontFamily = new System.Drawing.FontFamily("Consolas");
			var font = new System.Drawing.Font(
			   fontFamily,
			   14,
			   System.Drawing.FontStyle.Regular,
			   System.Drawing.GraphicsUnit.Point
			);

			var lineSpacing = (double)font.GetHeight();
			Print("linespacing: {0}", lineSpacing.ToString());

		}

    }
}

Thanks in advance,

Mat