Creating a System.Windows.Controls.Image throws an exception - how do I use the dispatcher to instan
- by Scott Whitlock
I'm running my unit tests on a piece of code that does the following in the test:
Assert.IsNotNull(target.Icon);
Inside the getter for the Icon property, I'm doing this:
System.Windows.Controls.Image img = new System.Windows.Controls.Image();
That's throwing this exception: System.InvalidOperationException : The calling thread must be STA, because many UI components require this.
I understand what that means, and I understand that I need to use the Dispatcher, but I'm a bit confused about how or why... this is a property of my ViewModel and I don't get any of these exceptions when running the application.
Other info: this only started failing when I upgraded to .NET 4.
