Comment 5 for bug 896615

This is now fixed (in the source) in a way that will work for you. However, I suggest you avoid using the Settings to control options for your use of NUnit. That approach will cause NUnit itself, both the Gui and Console runners, to use the settings you leave behind. A better approach for programmatic control is to place the options in the TestPackage you create. TestPackage settings will override anything in the general NUnit settings.