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Since Q3 2011, all existing skins, except Default, are moved to a separate skins assembly (Telerik.Web.UI.Skins.dll).
By doing so, we were able to reduce few megabytes off the main assembly and
transfer that load to the skins assembly. And though 6 megabytes might seem
modest for some, it's some 40% reduction in terms of the file size: Separate Skin Assembly in RadControls for ASP.NET AJAX with Q3'11.
As it was mentioned four months ago, all embedded skins (except the Default one, which will remain plugged in the Telerik.Web.UI.dll) will be shifted to the Telerik.Web.UI.Skins.dll and to utilize any embedded skin other than the Default skin, you will have to have a valid reference to the new AJAX skins dll in your project.
If a different from the Default skin is set and the Telerik.Web.UI.Skins.dll is not present in the /Bin folder, the following server error will appear on the page:
More information is available in these help articles:
Skins Location
and
Skins Troubleshooting
Note that you should restart Visual Studio after adding a reference to the Telerik.Web.UI.Skins.dll.
If you use the Telerik WebUI VSExtensions upgrade wizard to update your projects, upgrade the tool to version 2011.3.1125.0 or later in the Extensions Manager of Visual Studio. This will ensure that the Telerik.Web.UI.Skins.dll assembly will be copied automatically to the /bin folder by the upgrade wizard.
As it was mentioned four months ago, all embedded skins (except the Default one, which will remain plugged in the Telerik.Web.UI.dll) will be shifted to the Telerik.Web.UI.Skins.dll and to utilize any embedded skin other than the Default skin, you will have to have a valid reference to the new AJAX skins dll in your project.
If a different from the Default skin is set and the Telerik.Web.UI.Skins.dll is not present in the /Bin folder, the following server error will appear on the page:
Telerik.Web.UI.[Telerik Control] with ID='[Telerik Control ID]' was unable to find embedded skin with name '[Skin Name]'. Please, make sure that you spelled the skin name correctly, or if you want to use a custom skin, set EnableEmbeddedSkins=false.
More information is available in these help articles:
Skins Location
and
Skins Troubleshooting
Note that you should restart Visual Studio after adding a reference to the Telerik.Web.UI.Skins.dll.
If you use the Telerik WebUI VSExtensions upgrade wizard to update your projects, upgrade the tool to version 2011.3.1125.0 or later in the Extensions Manager of Visual Studio. This will ensure that the Telerik.Web.UI.Skins.dll assembly will be copied automatically to the /bin folder by the upgrade wizard.