Upgrading to .NET 4.5: An ItemsControl is inconsistent with its items source

Question

I\'m building an application, which uses many ItemControls(datagrids and listviews). In order to easily update these lists from background threads I used this extension to O

Answer 1

The answer from Jehof is correct.

We cannot yet target 4.5 and had this issue with our custom observable collections that already allowed background updates (by using the Dispatcher during event notifications).

If anyone finds it useful, I have used the following code in our application that targets .NET 4.0 to enable it to use this functionality if the execution environment is .NET 4.5:

public static void EnableCollectionSynchronization(IEnumerable collection, object lockObject)
{
    // Equivalent to .NET 4.5:
    // BindingOperations.EnableCollectionSynchronization(collection, lockObject);
    MethodInfo method = typeof(BindingOperations).GetMethod("EnableCollectionSynchronization", new Type[] { typeof(IEnumerable), typeof(object) });
    if (method != null)
    {
        method.Invoke(null, new object[] { collection, lockObject });
    }
}