How can I set the culture for individual MSTest test method(s)?

After recently finding an error that was due to not specifying InvariantCulture when parsing text into numbers, I wanted to beef up our unit tests so that they would catch the issue. I wrote a new test that changed the current culture to one with different numeric formatting, re-ran one of the existing test methods, then set the culture back. Unfortunately, the culture change also affected other test methods. Is there a way to do this such that the tests do not interact?
I did find that putting the culture-setting test last in the file would "solve" the problem, but I hate to rely on the test ordering since it's not guaranteed. In the following example, with a system culture of "en-EN", TestMethod1 and TestMethod2 will succeed if run by themselves. If I run all of the methods together, they all fail.

   [TestClass]
   public class UnitTest1
   {
      [TestMethod]
      public void TestMethodGerman()
      {
         var originalCulture = Thread.CurrentThread.CurrentCulture;
         Thread.CurrentThread.CurrentCulture = new CultureInfo("de-DE");
         TestMethod1();
         Thread.CurrentThread.CurrentCulture = originalCulture;
      }
      [TestMethod]
      public void TestMethod1()
      {
         double value = Double.Parse("3.00");
         Assert.AreEqual(value, 3.0);
      }

      [TestMethod]
      public void TestMethod2()
      {
         double value = Double.Parse("4.00");
         Assert.AreEqual(value, 4.0);
      }
   }