Revit二次开发1-Revit背景黑白颜色变换

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需求:Revit背景黑白颜色变化

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代码如下

Autodesk.Revit.ApplicationServices.Application application = commandData.Application.Application;
                Color oldBackgroundColor = application.BackgroundColor;
                Color newBackgroundColor;

                if ( == 0
                    && oldBackgroundColor.Blue == 0
                    && oldBackgroundColor.Green == 0)
                {
                    newBackgroundColor = new Color(255, 255, 255);
                }
                else
                {
                    newBackgroundColor = new Color(0, 0, 0);
                }

                application.BackgroundColor = newBackgroundColor;               
                return Result.Succeeded;