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Can we update the data context of a WPF control in a non-UI thread? Say we have a Label that has MyClass as data context, and bind Content to MyProperty : <Label Name="label" Content="{Binding MyProperty}" /> , where MyClass is simply: public class MyClass : INotifyPropertyChanged { int _myField; public int MyProperty { get { return _myField; } set { _myField = value; PropertyChanged(this, new PropertyChangedEventArgs("MyProperty")); } } public event PropertyChangedEventHandler PropertyChanged; } In a non-UI thread, we can do myClass.MyProperty = "updated" to update the content of the label, but we cannot do label.Content = "updated" directly. Is that correct? My own answer : Here's what I've found: From a non-UI thread, you cannot update a control; From a non-UI thread, you can update properties of a control's data context; From a non-UI thread, you cannot add items to or remove items from an ObserverableCollection that is bound to a control. But there is a workaround : http://geekswithblogs.net/NewThingsILearned/archive/2008/01/16/have-worker-thread-update-observablecollection-that-is-bound-to-a.aspx

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