We are following the latest trends in the web and mobile design, which is the reason why the color icons of RadButton were replaced by the modern looking monochrome and flat icons. The new icons also look similarly to the font icons
used by Bootstrap.
We are currently collecting customers' feedback about the usage of font icons in the Light-weight rendering
of the RadControls for ASP.NET AJAX controls. In any case we will provide an additional colorful sprite for RadButton if more customers require it.
You can always use the PrimaryIconUrl
properties of RadButton to specify and load your own colorful icons.
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