Thank you for writing us. There is no built-in way to add an image to a label.
However, you can use the workaround shown below:
ImagePrimitive imgPrimitive = new ImagePrimitive();
this.radLabel4.ImageList = this.imageList1;
imgPrimitive.Image = this.imageList1.Images;
If you have any other questions please write me back.
the Telerik team