First of all please excuse me if I misinterpreted your question. As far as I understand you are trying to show/display somehow metafield data associated with an IContent item.
In the scenario you have described the system is most likely complaining as it expects a collection of ContentItems to be bound to a repeater.
Please do make sure you are getting a single ContentItem, then hopefully it should all be sweet as.
Implementing such control could be achieved by having a bit of code similar to the one below:
|public void DisplaySingleContentItem(IContent listItem)
| String metafiledValueToDisplay = listItem.GetMetaData("Title") as String;
| //Display logic goes in here
Hope, that will get you going!
the Telerik team
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