I'm trying to carry out this example for deleting a content type in sharepoint: http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spcontenttypeusage.aspx

but I'm getting the error mentioned in the title of this question on the following line:

IList<SPContentTypeUsage> usages = SPContentTypeUsage.GetUsages(obsolete);
  • Are you sure you are not using the Client dll? Commented Jun 5, 2014 at 15:29

1 Answer 1


In my case I faced the same issue within a Sandboxed solution. So looks like it is a limitation for sandbox solution.

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