Unit testing silverlight classes throws System.UnauthorizedAccessException: Invalid cross-thread access

Question

I'm writing unit tests for my silverlight classes. Everytime I use of instance of a class/control from silverlight, I usually get this exception.

System.UnauthorizedAccessException: Invalid cross-thread access.

However, with other types, the silverlight unit test project is okay.

Any idea what I'm doing wrong?

Edit:

using System.Windows;
using System.Windows.Controls;
using Microsoft.Silverlight.Testing;
using Microsoft.VisualStudio.TestTools.UnitTesting;

[TestMethod]
public void SomeTest()
{
    var someTextBox = new TextBox(); // exception is triggered here
    // assume logic
}

Answer 1

I think i've solved it. the issue only is found whenever I use ReSharper for running my silverlight unit tests. But if i use the built in running web app for the silverlight tests, the exception is gone

Answer 2

You probably need AgUnit plugin for R# to run and debug Silverlight unit tests