CheckForBindingErrors.cs

public static void CheckForBindingErrors(DependencyObject  parent)
{
    // Examine parent for binding errors
    LocalValueEnumerator localValues = parent.GetLocalValueEnumerator();
    while (localValues.MoveNext())
    {
        LocalValueEntry entry = localValues.Current;
        if (BindingOperations.IsDataBound(parent, entry.Property))
        {
            BindingExpression binding =
                BindingOperations.GetBindingExpression(parent, entry.Property);
 
            if (binding.DataItem == null)
                continue;
 
            if (binding.Status == BindingStatus.PathError)
            {
                // Found binding error
            }
        }
    }
 
    // Examine children for binding errors
    for (int i = 0; i != VisualTreeHelper.GetChildrenCount(parent); ++i)
    {
        DependencyObject child = VisualTreeHelper.GetChild(parent, i);
        CheckForBindingErrors(child);
    }
}