public void CharCountWorks()
{
Assert.AreEqual(2, MHString.CharCount("1,2,3", ','), "t1");
Assert.AreEqual(0, MHString.CharCount("123", ','), "t2");
Assert.AreEqual(3, MHString.CharCount("13933838, 3030337300338, 3 ,23", ','), "t3");
Assert.AreEqual(0, MHString.CharCount("", ','), "t4");
Assert.AreEqual(3, MHString.CharCount("1,,,99", ','), "t5");
}