An item with the same key has already been added.
at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at GS.PflanzenCMS.UserControls.Video.UpdateMetaData(PageMetaData data) in C:\svn\trunk\Projects3\GS_PflanzenCMS.net\UserControls\Video.cs:line 203
at GS.PflanzenCMS.Classes.PageMetaData.AddComponents(IEnumerable`1 components) in C:\svn\trunk\Projects3\GS_PflanzenCMS.net\Classes\PageMetaData.cs:line 358
at GS.PflanzenCMS.Classes.PageMetaData.AddComponents(IEnumerable`1 components) in C:\svn\trunk\Projects3\GS_PflanzenCMS.net\Classes\PageMetaData.cs:line 364
at GS.PflanzenCMS.Controllers.CMSController.Index(Nullable`1 version) in C:\svn\trunk\Projects3\GS_PflanzenCMS.net\Controllers\CMSController.cs:line 217