We have wasted hours combing through examples trying to discover the declarative syntax for Telerik controls. We have not found the declarative syntax documented for any of the controls we use. We have often found properties that were actually supported but were not shown on a Properties page and some that were shown while in Design mode but not in Source mode (when they would actually be useful). Microsoft does not do a careful job documenting the syntax of their controls, but at least they list all the properties. We use this information often and are badly handicapped by the lack of comparable information for Telerik controls. It is turning what was supposed to be "rapid application development" into just the opposite -- a nightmare of experimental programming and code combing.
For example, from "Web server control syntax" in Microsoft MSDN, here's the start of the listing for the <asp:Menu> control --
<asp:Menu
AccessKey="string"
BackColor="color name|#dddddd"
BorderColor="color name|#dddddd"
BorderStyle="NotSet|None|Dotted|Dashed|Solid|Double|Groove|Ridge|
Inset|Outset"
BorderWidth="size"
CssClass="string"
DataSource="string"
DataSourceID="string"
DisappearAfter="integer"
DynamicBottomSeparatorImageUrl="uri"
DynamicEnableDefaultPopOutImage="True|False"
DynamicHorizontalOffset="integer"
DynamicItemFormatString="string"
DynamicPopOutImageTextFormatString="string"
DynamicPopOutImageUrl="uri"
DynamicTopSeparatorImageUrl="uri"
DynamicVerticalOffset="integer"
Enabled="True|False"
EnableTheming="True|False"
EnableViewState="True|False"
Font-Bold="True|False"
Font-Italic="True|False"
Font-Names="string"
Font-Overline="True|False"
Font-Size="string|Smaller|Larger|XX-Small|X-Small|Small|Medium|
Large|X-Large|XX-Large"
Font-Strikeout="True|False"
Font-Underline="True|False"
ForeColor="color name|#dddddd"
Height="size"
ID="string"
ItemWrap="True|False"
MaximumDynamicDisplayLevels="integer"
OnDataBinding="DataBinding event handler"
OnDataBound="DataBound event handler"
OnDisposed="Disposed event handler"
OnInit="Init event handler"
OnLoad="Load event handler"
OnMenuItemClick="MenuItemClick event handler"
OnMenuItemDataBound="MenuItemDataBound event handler"
OnPreRender="PreRender event handler"
OnUnload="Unload event handler"
Orientation="Horizontal|Vertical"
PathSeparator="string"
runat="server"
ScrollDownImageUrl="uri"
ScrollDownText="string"
ScrollUpImageUrl="uri"
ScrollUpText="string"
SkinID="string"
SkipLinkText="string"
StaticBottomSeparatorImageUrl="uri"
StaticDisplayLevels="integer"
StaticEnableDefaultPopOutImage="True|False"
StaticItemFormatString="string"
StaticPopOutImageTextFormatString="string"
StaticPopOutImageUrl="uri"
StaticSubMenuIndent="size"
StaticTopSeparatorImageUrl="uri"
Style="string"
TabIndex="integer"
Target="string"
ToolTip="string"
Visible="True|False"
Width="size"
>
-- Craig Bolon
Brookline, MA, USA