引用DevExpress.Images.vXX.1.dll文件，代码获取图标方法：
ImageCollection imageCollection = new ImageCollection();
imageCollection.Images.Add(DevExpress.Images.ImageResourceCache.Default.GetImage("images/actions/add_16x16.png"));DevExpress.Images.ImageResourceCache.Default.GetImageById("Add", DevExpress.Utils.Design.ImageSize.Size16x16, DevExpress.Utils.Design.ImageType.Colored)