Microsoft Connect Discussion
Here is some code to workaround:
static int CompareStringUsingSortKey(string s1, string s2)
{
SortKey sk1 = CultureInfo.InvariantCulture.CompareInfo.GetSortKey(s1);
SortKey sk2 = CultureInfo.InvariantCulture.CompareInfo.GetSortKey(s2);
return SortKey.Compare(sk1, sk2);
}