title: What does this usually mean, Error HRESULT E_FAIL has been returned from a call to a COM component.?
body: <p>I have a particular view with a DataGrid (silverlight 4). But i have a project where resources have been merged with another project (for backward support). Now, after this merge, i am getting this error whenever i try to add a new row oject to my ObservableCollection.... my theory is that it is something wrong with the xaml (which i can touch!) or, hopefully, the merged resources (styles &amp; brushes).</p>
  
  <pre><code>MS.Internal.WrappedException was unhandled by user code
    Message=Error HRESULT E_FAIL has been returned from a call to a COM component.
    StackTrace:
         at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
         at MS.Internal.XcpImports.UIElement_Measure(UIElement element, Size availableSize)
         at System.Windows.UIElement.Measure(Size availableSize)
         at System.Windows.Controls.DataGrid.InsertDisplayedElement(Int32 slot, UIElement element, Boolean wasNewlyAdded, Boolean updateSlotInformation)
         at System.Windows.Controls.DataGrid.OnAddedElement_Phase1(Int32 slot, UIElement element)
         at System.Windows.Controls.DataGrid.OnInsertedElement_Phase1(Int32 slot, UIElement element, Boolean isCollapsed, Boolean isRow)
         at System.Windows.Controls.DataGrid.InsertElement(Int32 slot, UIElement element, Boolean updateVerticalScrollBarOnly, Boolean isCollapsed, Boolean isRow)
         at System.Windows.Controls.DataGrid.InsertElementAt(Int32 slot, Int32 rowIndex, Object item, DataGridRowGroupInfo groupInfo, Boolean isCollapsed)
         at System.Windows.Controls.DataGrid.InsertRowAt(Int32 rowIndex)
         at System.Windows.Controls.DataGridDataConnection.NotifyingDataSource_CollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
         at System.Windows.Data.PagedCollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
         at System.Windows.Data.PagedCollectionView.ProcessAddEvent(Object addedItem, Int32 addIndex)
         at System.Windows.Data.PagedCollectionView.ProcessCollectionChanged(NotifyCollectionChangedEventArgs args)
         at System.Windows.Data.PagedCollectionView.&lt;.ctor&gt;b__0(Object sender, NotifyCollectionChangedEventArgs args)
         at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
         at System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item)
         at System.Collections.ObjectModel.Collection`1.Add(T item)
  InnerException: 
         Message=Error HRESULT E_FAIL has been returned from a call to a COM component.
         StackTrace:
              at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
              at MS.Internal.XcpImports.FrameworkElement_MeasureOverride(FrameworkElement element, Size availableSize)
              at System.Windows.FrameworkElement.MeasureOverride(Size availableSize)
              at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Single inWidth, Single inHeight, Single&amp; outWidth, Single&amp; outHeight)
         InnerException: 
  </code></pre>